https://community.wolfram.com RSS Feed for Wolfram Community showing any discussions from all groups sorted by most likes. https://community.wolfram.com/groups/-/m/t/181759 I was wondering, it would be interesting to try to use the community as a way to request new functions that could be incorporated into new versions of Wolfram Language, in a colaborative way. Sometimes users simply don't have the whole/deeper system view, to understand that the requested function is or too specific, too broad or already implemented, but I believe that another times we can have a nice insights, that Wolfram Research people haven't yet, or that do not have received much attention  yet.  To the idea is: [b]Post your's requested Function as a answer to this question, and let's upvotes show the more interesting ones![/b] Some rules 1- One Post per function (or class of function), you can have more than one request. 2- Exemplify your function use. Rodrigo Murta 2014-01-08T09:14:19Z https://community.wolfram.com/groups/-/m/t/2593151 **Introducing our brand new YouTube channel, [Wolfram R&D][1]! Our channel features livestreams, behind-the-scenes creator presentations, insider videos, and more.** ---------- Join us for the unique Wolfram R&D livestreams on [Twitch][2] and [YouTube][3] led by our developers! You will see **LIVE** stream indicators on these channels on the dates listed below. The live streams provide tutorials and behind the scenes look at Mathematica and the Wolfram Language directly from developers. 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It was a blast to see all the amazing art you created. After deliberation by our judges, these are the winners: - **Honorable Mention**: ARTIST: [Daniel Hoffmann][1], EXHIBIT: "[The Memory of Persistence][2]" - **Staff Winner**: ARTIST: [Anton Antonov][3], EXHIBIT: "[Rorschach mask animations projected over 3D surfaces][4]" - **3rd Place**: ARTIST: [Jacqueline Doan][5], EXHIBIT: "[Kuramoto oscillators with phase lag][6]" - **2nd Place**: ARTIST: [Tom Verhoeff][7], EXHIBIT: "[Sculpture from 18 congruent pieces][8]" - **1st Place**: ARTIST: [Frederick Wu][9], EXHIBIT: "[Love heart jewelry IV: the giving tree][10]" ![enter image description here][11] ---------- # CONTEST Flex your creative and computational skill with Wolfram's Computational Art Contest that kicks off today, Monday, March 28th! Share your work with the community, and potentially win free Wolfram merchandise. Programmers and artists of all skill levels are encouraged to participate! This contest is inspired by Genuary, an annual project releasing generative art prompts during the month of January. We're elated to see the creative works of our users and engage with the community while exploring the scope of computational art within the Wolfram Language. ## Rules & Guidelines ## - Submission deadline is April 25th at 9am Central Time. Posts posted after will not be included in judging - Participants must fill out a detailed Community profile ( example: https://community.wolfram.com/web/claytonshonkwiler ) and create a Community post about their submission. The post must include the code used to create graphics and the final piece of art placed at the top of the post. An explanation of how their code works is required, moreover participants are encouraged to write more about their creative process. - Participants submit their entry by commenting on this post with an image of their art, along with a link to their Community post - Multiple submissions per participant are allowed, but please keep the number of submissions under three - Each participant can only win once. Participants' best-performing piece, as determined by the judges, will be used when determining winners - Both static images and animations can be submitted. Animations are preferred in a GIF format; if the animation is too large for a GIF, the post can point to a public YouTube video. - Submissions will be judged by a handful of Wolfram experts, with the following parameters: - Visual aesthetics - Wolfram Language code - Creativity - Explanation of process - Submissions from all areas of computational art are welcome - Submissions from former or current Wolfram employees are allowed, but will be judged as their own category with only one winner - Submitting previous work/posts is allowed, but must meet the requirements stated above ## Encouragements ## - Not sure where to start? We encourage you to look at other user's submission for inspiration, or look at some of the work in the visual arts group of Community: - Artists' group: https://wolfr.am/ART-examples - Artist (see Staff Picks section): https://community.wolfram.com/web/claytonshonkwiler - We encourage you to vote and comment on other people's submissions. - Please spread the word about this competition, among your friends and other social media! ## Prizes ## First, second, and third place winners will be featured on all of Wolfram's social media accounts, as well as receiving their choice of free Wolfram merchandise. We are able to ship merchandise to countries listed on the Wolfram Store: https://store.wolfram.com. If your country is not listed on the Wolfram Store, we strongly encourage you to still submit an entry, as we will feature winners submissions regardless of location. ### Important ### All contest rules have been explained above under Rules & Guidelines. It's encouraged for all participants to read the rules carefully to prevent disqualification. If you have any additional questions, ask directly in the thread comments or contact us by email at t-artcontest@wolfram.com . We recommend reading other people comments as they clarify the nature of the contest as well. Comments deemed by moderators as superfluous to the thread may be removed or transferred by moderators to keep competition professional. [1]: https://community.wolfram.com/web/danielsanderhoffmann [2]: https://community.wolfram.com/groups/-/m/t/2518220 [3]: https://community.wolfram.com/web/antononcube [4]: https://community.wolfram.com/groups/-/m/t/2518279 [5]: https://community.wolfram.com/web/jacquelinengocdoan [6]: https://community.wolfram.com/groups/-/m/t/2509110 [7]: https://community.wolfram.com/web/tverhoeff [8]: https://community.wolfram.com/groups/-/m/t/2513265 [9]: https://community.wolfram.com/web/wufei1978 [10]: https://community.wolfram.com/groups/-/m/t/2430827 [11]: https://community.wolfram.com//c/portal/getImageAttachment?filename=news-congrads-kkluyshnik-02-04-19.jpg&userId=11733 Eryn Gillam 2022-03-28T17:35:43Z https://community.wolfram.com/groups/-/m/t/20688 Hello and welcome to Wolfram Community! This is the official networking portal for the users of Wolfram technologies, a virtual home to our global family. Here you can connect, interact, share ideas, and ask questions. Start from the following:  [list] [*]Read the [url=http://community.wolfram.com/guidelines]Community Guidelines[/url] [*]Fill out your profile information [*]Browse and join [url=http://community.wolfram.com//groups][/url][url=http://www.wolfram.com/community/web/community/groups]Groups[/url]  [*]Explore and have a great time! [/list]This is our “introduce yourself” thread where you can say a few things about yourself by simply replying to this post. As soon as you do, the thread will bubble up to the top of our front page and everyone will know that you have joined and have a chance to read about you. To give you an example, I will introduce myself. I am a member of the Technical Communication and Strategy group at Wolfram Research. I get to play with almost every tidbit of the technologies we develop, build exemplary usage cases, and showcase them to the world through our sites and events. I publish at the Wolfram Demonstrations Project, write for the Wolfram Blog, and am a faculty member at the Wolfram Science Summer School. Among these and other things, I oversee management and moderation of Wolfram Community. Now it is your turn! Please note this thread is long (so many new members!) and the reply box is at the bottom. Now, please, tell us who you are! Vitaliy Kaurov 2012-10-18T06:49:28Z https://community.wolfram.com/groups/-/m/t/1872608 *Short URL to share this post*: https://wolfr.am/coronavirus ***JOIN*** *our* ***Medical Sciences*** *group for the latest updates & best networking*: https://wolfr.am/MedicalSciences ---------- This post is intended to be the hub for Wolfram resources related to novel coronavirus disease COVID-19 that originated in Wuhan, China. The larger aim is to provide a forum for disseminating ways in which Wolfram technologies and coding can be utilized to shed light on the virus and pandemic. Possibilities include using the Wolfram Language for data-mining, modeling, analysis, visualizations, and so forth. Among other things, we encourage comments and feedback on these resources. Please note that this is intended for technical analysis and discussion supported by computation. Aspects outside this scope and better suited for different forums should be avoided. Thank you for your contribution! ## ________________________________________ ## FEATURED CONTENT - [COVID-19 Livestream Notebook March 24][8] by Stephen Wolfram - [Agent-Based Networks Models for COVID-19][9] by Christopher Wolfram - [Live-Stream: Exploring Pandemic Data][10] by Stephen & Christopher Wolfram + guests - [Live-Stream: Exploring and Explaining Epidemic Modeling][11] by Stephen & Christopher Wolfram + guests ## ________________________________________ ## [CALL for Making COVID-19 Data Computable (*link*)][12] More pandemic-related information and data sets emerging every day. We invite people in the community to contribute to making more data surrounding this topic computable. Here is a call to action with some recommendations for people who want to do more, whether it's just pointing out relevant data sources, or taking the time to make some of that data computable and more instantly ready for other people to explore: https://wolfr.am/COVID-19-DATA . ## ________________________________________ ## [Curated Computable Data (*link*)][13] [FOLLOW THIS LINK][14] to see all available COVID-19 data repositories ready for computation in the Wolfram Language . [Changes in Updates to SARS-CoV-2 Sequences in the Wolfram Data Repository][16] We have published and are continuously updating the Wolfram Data Repository entries. Below are a few key ones. Follow the link above to browse all repositories. We encourage you to make [*your own contributions*][15] of curated data relevant to COVID-19. > **Pandemic Data for Novel Coronavirus COVID-19** > https://www.wolframcloud.com/obj/resourcesystem/published/DataRepository/resources/Epidemic-Data-for-Novel-Coronavirus-COVID-19 > **Genetic Sequences for the SARS-CoV-2 Coronavirus** > https://datarepository.wolframcloud.com/resources/Genetic-Sequences-for-the-SARS-CoV-2-Coronavirus > **Patient Medical Data for Novel Coronavirus COVID-19** > https://datarepository.wolframcloud.com/resources/Patient-Medical-Data-for-Novel-Coronavirus-COVID-19 > **COVID-19 Hospital Resource Use Projections** > https://datarepository.wolframcloud.com/resources/COVID-19-Hospital-Resource-Use-Projections > **OECD Data: Hospital Beds Per Country** > https://datarepository.wolframcloud.com/resources/OECD-Data-Hospital-Beds-Per-Country > **Hospital Beds Per US State** > https://datarepository.wolframcloud.com/resources/Hospital-Beds-Per-US-State ## ________________________________________ ## [Computational Publications (*link*)][17] We encourage you to share your computational explorations relevant to coronavirus on Wolfram Community as stand-alone articles and then comment with their URL links on this discussion thread. We will summarize these articles in the following list: ### ________________________________ ###FEATURED > **COVID-19 Livestream Notebook March 24** by Stephen Wolfram > https://www.wolframcloud.com/obj/s.wolfram/Published/COVID-19-Livestream-March-24.nb > **Agent-Based Networks Models for COVID-19** by Christopher Wolfram > https://community.wolfram.com/groups/-/m/t/1907703 > **Epidemiological Models for Influenza and COVID-19** by Robert Nachbar > https://community.wolfram.com/groups/-/m/t/1896178 > **Epidemic simulation with a polygon container** by Francisco Rodríguez > https://community.wolfram.com/groups/-/m/t/1901002 > **Distance to nearest confirmed US COVID-19 case** by Chip Hurst > https://community.wolfram.com/groups/-/m/t/1911583 ### ________________________________ ### EPIDEMIC MODELING: SIMULATION > **Epidemic simulation with a polygon container** by Francisco Rodríguez > https://community.wolfram.com/groups/-/m/t/1901002 > **Agent based epidemic simulation** by Jon McLoone > https://community.wolfram.com/groups/-/m/t/1900481 > **Modeling the spatial spread of infection diseases in the US** by Diego Zviovich > https://community.wolfram.com/groups/-/m/t/1889072 > **Geo-spatial-temporal COVID-19 simulations and visualizations over USA** by Diego Zviovich > https://community.wolfram.com/groups/-/m/t/1900514 > **Life, Liberty, and Lockdowns: cellular automaton approach** by Philip Maymin > https://community.wolfram.com/groups/-/m/t/2181433 ### ________________________________ ### EPIDEMIC MODELING: COMPARTMENTAL > **Teaching notebook on disease models** by Gareth Russell > https://community.wolfram.com/groups/-/m/t/2694698 > **Stochastic Epidemiology Models with Applications to the COVID-19** by Robert Nachbar > https://community.wolfram.com/groups/-/m/t/1980051 > **COVID19: Italian SIRD estimates and prediction** by Christos Papahristodoulou > https://community.wolfram.com/groups/-/m/t/1984320 > **Solver for COVID-19 epidemic model with the Caputo fractional derivatives** by Alexander Trounev > https://community.wolfram.com/groups/-/m/t/1976589 > **EpiPlay: using Mathematica to gamify education in epidemiology** by Rui Alves > https://community.wolfram.com/groups/-/m/t/2535927 > **Epidemiological Model for repetitive rapid testing for COVID-19** by Diego Zviovich > https://community.wolfram.com/groups/-/m/t/2075883 > **Phase transition of a SIR agent-based models** by Diego Zviovich > https://community.wolfram.com/groups/-/m/t/1977230 > **A simple estimate of covid-19 fatalities based on past data** by Kay Herbert > https://community.wolfram.com/groups/-/m/t/1959438 > **SIR Model with Log-normal infected periods** by Diego Zviovich > https://community.wolfram.com/groups/-/m/t/1946292 > **SEI2HR-Econ model with quarantine and supplies scenarios** by Anton Antonov > https://community.wolfram.com/groups/-/m/t/1937880 > **COVID-19 - Policy Simulator - Can you find the perfect policy?** by Jan Brugard > https://community.wolfram.com/groups/-/m/t/1931352 > **Epidemiological Models for Influenza and COVID-19** by Robert Nachbar > https://community.wolfram.com/groups/-/m/t/1896178 > **Exploring Epidemiological Modeling** by Jordan Hasler > https://community.wolfram.com/groups/-/m/t/1920119 > **SEI2HR model with quarantine scenarios** by Anton Antonov > https://community.wolfram.com/groups/-/m/t/1926505 > **The SIR Model for Spread of Disease** by Arnoud Buzing > https://community.wolfram.com/groups/-/m/t/1903289 > **COVID-19 - R0 and Herd Immunity - are we getting closer?** by Jan Brugard > https://community.wolfram.com/groups/-/m/t/1911422 > **Basic experiments workflow for simple epidemiological models** by Anton Antonov > https://community.wolfram.com/groups/-/m/t/1895675 > **Scaling of epidemiology models with multi-site compartments** by Anton Antonov > https://community.wolfram.com/groups/-/m/t/1897377 > **WirVsVirus 2020 hackathon participation** by Anton Antonov > https://community.wolfram.com/groups/-/m/t/1907256 > **An SEIR like model that fits the coronavirus infection data** by Enrique Garcia Moreno > https://community.wolfram.com/groups/-/m/t/1888335 > **A SEIRD Model For COVID-19 Using DDEs** by Luis Borgonovo > https://community.wolfram.com/groups/-/m/t/1996374 > **A Neat Package for Compartmental Model Diagrams** by Hamza Alsamraee > https://community.wolfram.com/groups/-/m/t/2078640 > **Redesign of didactics of S(E)IR(D) -> SI(EY)A(CD) models of epidemics** by Thomas Colignatus > https://community.wolfram.com/groups/-/m/t/2004784 > **COVID-19 SIR models: transmission, vaccination, herd immunity dynamics revealed** by Athanasios Paraskevopoulos > https://community.wolfram.com/groups/-/m/t/3008488 ### ________________________________ ### EPIDEMIC MODELING: LOGISTIC > **COVID-19 pandemic data in Italy** by Riccardo Fantoni > https://community.wolfram.com/groups/-/m/t/1909687 > **Predicting Coronavirus Epidemic in United States** by Robert Rimmer >https://community.wolfram.com/groups/-/m/t/1906954 > **Tracking Coronavirus Testing in the United States** by Robert Rimmer > https://community.wolfram.com/groups/-/m/t/1902302 > **Logistic Model for Quarantine Controlled Epidemics** by Robert Rimmer > https://community.wolfram.com/groups/-/m/t/1900530 > **Updated: coronavirus logistic growth model: China** by Robert Rimmer > https://community.wolfram.com/groups/-/m/t/1890271 > **Coronavirus logistic growth model: China** by Robert Rimmer > https://community.wolfram.com/groups/-/m/t/1887435 > **Coronavirus logistic growth model: Italy and South Korea** by Robert Rimmer > https://community.wolfram.com/groups/-/m/t/1887823 > **Coronavirus logistic growth model: South Korea** by Robert Rimmer > https://community.wolfram.com/groups/-/m/t/1894561 > **Logistic growth model for epidemic Covid-19 in Colombia** by Diego Ramos > https://community.wolfram.com/groups/-/m/t/2092786 ### ________________________________ ### GENOMICS > **Analyzing the spread of SARS-CoV-2 variants in California** by Daniel Lichtblau > https://community.wolfram.com/groups/-/m/t/2205357 > **Analyzing the spread of SARS-CoV-2 variants in Florida** by Daniel Lichtblau > https://community.wolfram.com/groups/-/m/t/2206874 > **Analyzing Nextstrain Data with WFR Newick Functions (COVID-19/SARS-CoV-2)** by John Cassel > https://community.wolfram.com/groups/-/m/t/1958952 > **Finding and analyzing a COVID subvariant in Australia** by Daniel Lichtblau > https://community.wolfram.com/groups/-/m/t/2342489 > **Analyzing SARS-CoV-2 Genetic Sequences** by John Cassel & Daniel Lichtblau > https://blog.wolfram.com/2021/08/19/newick-trees-proximity-resources-and-accessions-analyzing-sars-cov-2-genetic-sequences/ > **Estimating the number of times the SARS CoV-2 virus has replicated** by Carlos Munoz > https://community.wolfram.com/groups/-/m/t/1943243 >**From sequenced SARS-CoV-2 genomes to a phylogenetic tree** by Daniel Lichtblau >https://community.wolfram.com/groups/-/m/t/1961461 > **Genome analysis and the SARS-nCoV-2** by Daniel Lichtblau > https://community.wolfram.com/groups/-/m/t/1874816 > **Visualizing Sequence Alignments from the COVID-19** by Jessica Shi > https://community.wolfram.com/groups/-/m/t/1875352 > **A walk-through of the SARS-CoV-2 nucleotide Wolfram resource** by John Cassel > https://community.wolfram.com/groups/-/m/t/1887456 > **Geometrical analysis of genome for COVID-19 vs SARS-like viruses** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1878824 > **Chaos Game For Clustering of Novel Coronavirus COVID-19** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1875994 ### ________________________________ ### DATA ANALYSIS > **Optimal Annual COVID-19 Vaccine Boosting Dates Following Previous Booster Vaccination or Breakthrough Infection** by Jeffrey Townsend > https://community.wolfram.com/groups/-/m/t/3341399 > **Probability of early infection extinction depends linearly on the virus clearance rate** by Nóra Juhász > https://community.wolfram.com/groups/-/m/t/3307502 > **Detecting Global Community Structure in a COVID-19 Activity Correlation Network** by Hiroki Sayama > https://community.wolfram.com/groups/-/m/t/3056172 > **Analyzing trends of COVID-19 through public news feeds** by Silvia Hao > https://community.wolfram.com/groups/-/m/t/2569395 > **Deep neural network detection & clinical staging of COVID-19 chest X-rays** by Peter Riley > https://community.wolfram.com/groups/-/m/t/2389110 > **COVID-19 - The Swedish Experiment - Is it working?** by Jan Brugard > https://community.wolfram.com/groups/-/m/t/1974412 > **A simple COVID-19 spread model** by Daniel Lichtblau > https://community.wolfram.com/groups/-/m/t/1945196 > **COVID19: The performance of the Swedish strategy** by Christos Papahristodoulou > https://community.wolfram.com/groups/-/m/t/1990972 > **Exploring social trends on Covid-19 pandemic using WikipediaData** by Jofre Espigule-Pons > https://community.wolfram.com/groups/-/m/t/1931508 > **Google Mobility Data** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1946686 > **Understanding Aggregate COVID Curves** by Christopher Wolfram > https://community.wolfram.com/groups/-/m/t/2068457 > **Apple mobility trends data visualization** by Anton Antonov > https://community.wolfram.com/groups/-/m/t/1942813 > **Computing COVID-19 Spread Rates in US Cities** by Daniel Lichtblau > https://community.wolfram.com/groups/-/m/t/1930261 > **COVID-19 data and the Newcomb Benford Distribution** by Gustavo Delfino > https://community.wolfram.com/groups/-/m/t/1913908 > **Short-time trends for COVID-19**, by Fabian Wenger > https://community.wolfram.com/groups/-/m/t/1912710 > **What countries are hit hard by COVID19 outbreak?** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1904507 > **COVID19 in Iran: under-diagnosis issue** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1891140 > **Coronavirus analysis: descriptive statistics with SQL functions** by Damian Calin > https://community.wolfram.com/groups/-/m/t/2206078 > **Covid-19 vaccine campaigns efficacy analysis** by Damian Calin > https://community.wolfram.com/groups/-/m/t/2383314 > **Argentina: COVID-19 Data Analysis** by Tobias Canavesi > https://community.wolfram.com/groups/-/m/t/1932910 > **Analysis of the Change in Phillips Curve After COVID-19 with Regression** by Seojin Yoon > https://community.wolfram.com/groups/-/m/t/2055704 > **COVID wave alert: statistical analysis and visualization** by Antonio Neves > https://community.wolfram.com/groups/-/m/t/2115658 > **Predicting COVID-19 using cough sounds classification** by Siria Sadeddin > https://community.wolfram.com/groups/-/m/t/2166833 > **Covid-19 vaccination data analysis using SQL functions** by Damian Calin > https://community.wolfram.com/groups/-/m/t/2324474 > **Analyzing COVID-19 vaccine sentiment over time** by Arshaan Sayed > https://community.wolfram.com/groups/-/m/t/2317293 > **VAERS data analysis using SQL functions** by Damian Calin > https://community.wolfram.com/groups/-/m/t/2351726 > **Correlating COVID-19 government measures to biweekly/daily outbreaks** by Arshaan Sayed > https://community.wolfram.com/groups/-/m/t/2362327 > **Plotting Covid19 sentiment in different regions of Chennai** by Aditya Sairam Prakash > https://community.wolfram.com/groups/-/m/t/2388236 ### ________________________________ ### DATA VISUALIZATIONS > **CDC COVID19 vaccination data across US counties** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/2282418 > **Top 20 COVID countries HeatMap by absolute death and death in ppm** by Rodrigo Murta > https://community.wolfram.com/groups/-/m/t/2004800 > **COVIDWORLD app: current data and visualizations for SARS-CoV2 pandemic** by Rui Alves > https://community.wolfram.com/groups/-/m/t/2473065 > **US Counties COVID-19 confirmed cases by population density timelines** by Bob Sandheinrich > https://community.wolfram.com/groups/-/m/t/1992898 > **3D Modeling of the SARS-CoV-2 Virus in the Wolfram Language** by Jeff Bryant > https://community.wolfram.com/groups/-/m/t/1989540 > **California COVID19 Data** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/2132204 > **COVID-19 progress in Peru macro regions: coast vs mountain vs jungle** by Francisco Rodríguez > https://community.wolfram.com/groups/-/m/t/1965079 > **COVID-19 reopening criterion: a simple visualization** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1962615 > **100 Days of COVID19 Over US Counties** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1956368 > **Population Density Map** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1955760 > **Google Mobility Data** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1946686 > **COVID19 Case-Fatality Ratio, Income, and Age: Simple Visualization** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1939045 > **Data Analysis of Coronavirus in Mexico** by Ivan Martinez > https://community.wolfram.com/groups/-/m/t/1927657 > **Confirmed COVID-19 Cases in Catalonia** by Bernat Espigulé Pons > https://community.wolfram.com/groups/-/m/t/1919468 > **Distance to nearest confirmed US COVID-19 case** by Chip Hurst > https://community.wolfram.com/groups/-/m/t/1911583 > **COVID19 Confirmed Cases: US Counties** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/1950980 > **COVID19 data visualization across US counties** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/2119049 > **Maps for Visualizing Covid-19's Effect** by Eric Mockensturm > https://community.wolfram.com/groups/-/m/t/1934457 > **US Counties COVID-19 deaths plot** by Bob Sandheinrich > https://community.wolfram.com/groups/-/m/t/1918332 > **Comparing the spread of COVID-19 between countries**, Jan Brugard > https://community.wolfram.com/groups/-/m/t/1905992 > **NY Times COVID-19 data visualization** by Anton Antonov > https://community.wolfram.com/groups/-/m/t/1911668 > **COVID-19 cases for each administrative division in Spain** by Bernat Espigulé Pons > https://community.wolfram.com/groups/-/m/t/1910116 > **Propagation risk of COVID-19 by local contact in Spain (10 - 14 March)** by Bernat Espigulé Pons > https://community.wolfram.com/groups/-/m/t/1898126 > **Visualizing the Pandemic Data COVID-19** by Martijn Froeling > https://community.wolfram.com/groups/-/m/t/1899870 > **COVID-19 visualization of turning point** by Isao Maruyama > https://community.wolfram.com/groups/-/m/t/1899911 > **Mapping "Live" COVID Data on a Globe** by Gabriel Lemieux > https://community.wolfram.com/groups/-/m/t/1902102 > **Novel Coronavirus COVID-19 in Brazil** by Estevao Teixeira > https://community.wolfram.com/groups/-/m/t/1905950 > **Mapping Novel Coronavirus COVID-19 Outbreak** by Jofre Espigule-Pons > https://community.wolfram.com/groups/-/m/t/1868945 > **Ways to visualize COVID-19 simulation results?** by Kyle Keane > https://community.wolfram.com/groups/-/m/t/1962739 > **General and COVID-19 deaths in Sweden** by Oscar Rodriguez > https://community.wolfram.com/groups/-/m/t/2006377 > **COVID19 Tokyo per days of the week** Isao Maruyama > https://community.wolfram.com/groups/-/m/t/2133807 ### ________________________________ ### DATA PROCESSING > **Cov-Tell: Daily COVID-19 Updates with Alexa (made with Wolfram APIFunction)** by Jessica Shi > https://community.wolfram.com/groups/-/m/t/1958307 > **Build a COVID-19 Chest X-Ray Image Uploader with Cloud & Data Drop** by Jofre Espigule-Pons > https://community.wolfram.com/groups/-/m/t/1919770 > **Scraping OpenTable's "State of the Industry" page** by Aaron Enright > https://community.wolfram.com/groups/-/m/t/1911043 > **City-level Search Tool for Coronavirus (COVID-19) Confirmed Cases** by David Lomiashvili > https://community.wolfram.com/groups/-/m/t/1913247 > **Web Scraper: New York Times Coronavirus Data** by Robert Rimmer > https://community.wolfram.com/groups/-/m/t/1894426 > **TraCOV: Personalized COVID-19 Risk Analysis Tool** by Jessica Shi > https://community.wolfram.com/groups/-/m/t/1977700 > **Mobility changes data: transforming to Wolfram Language dataset** by Mads Bahrami > https://community.wolfram.com/groups/-/m/t/2160386 ### ________________________________ ### MASKS > **Effect of mandatory mask usage in COVID cases** by Diego Zviovich > https://community.wolfram.com/groups/-/m/t/1919060 > **Face mask detection: classifying image data** by Siria Sadeddin > https://community.wolfram.com/groups/-/m/t/2139499 ## ________________________________________ ## [Livestream Archives (*link*)][18] - Stephen & Christopher Wolfram + guests [Exploring Pandemic Data][19] - Stephen & Christopher Wolfram + guests [Exploring and Explaining Epidemic Modeling][20] - Robert Nachbar - [Epidemiological Models for Influenza and COVID-19][21] - Brian Wood - [COVID-19 Dashboard Visualizations][22] - John Cassel - [Behind the Genetic Sequences for Novel Coronavirus SARS-CoV-2][23] - Keiko Hirayama - [Patient Data Exploration for the Novel Coronavirus COVID-19][24] - Keiko Hirayama - [Pandemic Data Exploration for the Novel Coronavirus COVID-19][25] - Diego Zviovich - [Geo-spatial-temporal COVID-19 Simulations and Visualizations Over USA][26] - Anton Antonov - [COVID19 Epidemic Modeling: Compartmental Models][27] - Anton Antonov - [Scaling of Epidemiology Models with Multi-site Compartments][28] - Anton Antonov - [Simple Economic Extension of Compartmental Epidemiological Models][29] - Juan Klopper - [Coronavirus medical data analysis][30] - Juan Klopper - [Coronavrirus epidemiological data analysis][31] - Rory Foulger - [Coronavirus Data Exploration - Wolfram Livecoding with Students][32] ## ________________________________________ ## Other useful resources - Arnoud Buzing [GitHub][33] repository and [Notebook Gallery][34] for coronavirus - [Modeling a Pandemic like Ebola with the Wolfram Language](https://blog.wolfram.com/2014/11/04/modeling-a-pandemic-like-ebola-with-the-wolfram-language) - [Epidemics at Wolfram Demonstrations](https://demonstrations.wolfram.com/search.html?query=epidemic) - [IGSIRProcess - IGraph Epidemic models][35] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=1China_c.png&userId=1624544 [2]: https://community.wolfram.com//c/portal/getImageAttachment?filename=1.5US_c.png&userId=1624544 [3]: https://community.wolfram.com//c/portal/getImageAttachment?filename=2World_c.png&userId=1624544 [4]: https://community.wolfram.com//c/portal/getImageAttachment?filename=3Genetic_c.png&userId=1624544 [5]: https://community.wolfram.com//c/portal/getImageAttachment?filename=4Patient_c.png&userId=1624544 [6]: https://community.wolfram.com//c/portal/getImageAttachment?filename=5Resources_c.png&userId=1624544 [7]: https://www.wolframcloud.com/obj/examples/COVID19Preview.png [8]: https://www.wolframcloud.com/obj/s.wolfram/Published/COVID-19-Livestream-March-24.nb [9]: https://community.wolfram.com/groups/-/m/t/1907703 [10]: https://youtu.be/Vs5APySGYnk [11]: https://youtu.be/kC6LHAv_lx0 [12]: https://community.wolfram.com/groups/-/m/t/1908923 [13]: https://datarepository.wolframcloud.com/search/?i=COVID-19 [14]: https://datarepository.wolframcloud.com/search/?i=COVID-19 [15]: https://reference.wolfram.com/language/workflow/SubmitToTheWolframDataRepository.html [16]: https://community.wolfram.com/groups/-/m/t/2238214 [17]: http://wolfr.am/StaffPicks [18]: https://www.youtube.com/playlist?list=PLxn-kpJHbPx3_hUbroRYC_7NxcOwZ1SWa [19]: https://youtu.be/Vs5APySGYnk [20]: https://youtu.be/kC6LHAv_lx0 [21]: https://youtu.be/pcFB6_yrxGE [22]: https://youtu.be/vUq8qx7kTYA [23]: https://youtu.be/HCJgv3N_kDo [24]: https://youtu.be/MlI_8o4A3BA [25]: https://youtu.be/P86ZY-znE64 [26]: https://youtu.be/Kjk-sYlg-U0 [27]: https://youtu.be/LRs9rYCXIzs [28]: https://youtu.be/b8oCNjRI0gY [29]: https://youtu.be/C-sjXQiPE7s [30]: https://youtu.be/gA0TPQZgNY0 [31]: https://youtu.be/I-n3zN4aU6c [32]: https://youtu.be/4xCfPIiredM [33]: https://github.com/arnoudbuzing/wolfram-coronavirus [34]: https://wolfr.am/JZNRriEE [35]: http://szhorvat.net/mathematica/IGDocumentation/#epidemic-models Vitaliy Kaurov 2020-02-04T15:18:14Z https://community.wolfram.com/groups/-/m/t/2458169 A new study group devoted to Cryptography begins next Monday! I will be leading this group daily, Monday to Friday, over the next three weeks, until February 18. The curriculum follows the upcoming Wolfram U course "[Introduction to Cryptography][1]". A list of daily topics can be found on the [Daily Study Groups][2] page. The study group sessions include videos and reading materials for the course and time for discussion and Q&A. After the study group will help you may complete the course quizzes and achieve the "Course Completion" certificate for the "[Introduction to Cryptography][3]" . > **REGISTER HERE:** > https://www.bigmarker.com/series/daily-study-group-intro-to-cryptography/series_details > **About This Study Group:** Cryptography has existed for thousands of years and currently is a fascinating topic to study because of the close ties it forges between theory and practice. It makes use of bitwise computations, advanced algebra, string operations and everything in between. The Wolfram Language, with functions that provide basic building blocks for modern cryptography, makes a great tool for hands-on understanding of various concepts. In this Study Group, you will follow video lessons from the new Wolfram U course Introduction to Cryptography and learn about the concepts, underlying math and connections to real-world scenarios. ![enter image description here][4] P.S: Don't worry if you are unable to attend every session live: the recordings will be sent out to those who registered! [1]: https://www.wolfram.com/wolfram-u/introduction-to-cryptography/ [2]: https://www.bigmarker.com/series/daily-study-group-intro-to-cryptography/series_details [3]: https://www.wolfram.com/wolfram-u/introduction-to-cryptography/ [4]: https://community.wolfram.com//c/portal/getImageAttachment?filename=WolframUbanner.jpg&userId=20103 Dariia Porechna 2022-01-28T13:31:36Z https://community.wolfram.com/groups/-/m/t/3106406 A Wolfram U Daily Study Group previewing our upcoming Programming Proficiency [course sequence][1] begins on Monday, January 29, 2024. The study group will run for ten days through February 9, and each day will run from 11AM to noon CDT. Join me, [@Abrita Chakravarty][at0] and a cohort of fellow enthusiasts to build a strong foundation for any and all sorts of Wolfram Language programming that you'll do in the future. We'll cover everything from syntax, definitions, and the underlying structure of expressions to efficient coding, working with various data structures, and even developing packages. This study group will cover material from our [Programming Fundamentals][2] and [Practical Programming][3] courses, as well as provide attendees a first look at Programming and Development, the upcoming third and final course in the Programming Proficiency course sequence. Our intent is to provide a setting for this material which not only reaps the benefits of our Daily Study Groups'... well, *group* nature, but also spreads this material out over two weeks for those who cannot commit to the three-hour blocks required by these courses in their natural habitat. This study groups aims to get you up and running with Wolfram Language, and as such no prior Wolfram Language or programming experience is necessary. >[**REGISTER HERE.**][4] We look forward to seeing you there! ![enter image description here][5] [at0]: https://community.wolfram.com/web/abritac [1]: https://www.wolfram.com/wolfram-u/courses/programming-applications/wolfram-language-programming-proficiency-dev810/ [2]: https://www.wolfram.com/wolfram-u/courses/programming-applications/programming-fundamentals-dev210/ [3]: https://www.wolfram.com/wolfram-u/courses/programming-applications/practical-programming-dev211/ [4]: https://www.bigmarker.com/series/daily-study-group-programming-proficiency-wsg48/series_details?utm_bmcr_source=community [5]: https://community.wolfram.com//c/portal/getImageAttachment?filename=wolframubanner.png&userId=1711324 Arben Kalziqi 2024-01-20T00:07:52Z https://community.wolfram.com/groups/-/m/t/3241186 A Wolfram U Daily Study Group on ["Introduction to Calculus"][1] begins on Monday, August 12, 2024. Join a cohort of fellow mathematics enthusiasts to learn about the fundamentals of calculus from the recent [Introduction to Calculus][2] ebook by John Clark and myself. Our topics will include functions and limits, differential and integral calculus, and practical applications of calculus. The study group will be led by expert Wolfram U instructor [Luke Titus][4], and I will stop by occasionally to check in with the group. It should be a lot of fun! No prior Wolfram Language experience is required. Please feel free to use this thread to collaborate and share ideas, materials and links to other resources with fellow learners. **Dates** August 12- September 6, 2024, 11am-12pm CT (4-5pm GMT) > **[REGISTER HERE][5]** ![enter image description here][6] [1]: https://www.bigmarker.com/series/introduction-to-calculus-wsg56/series_details?utm_bmcr_source=community [2]: https://www.wolfram-media.com/products/introduction-to-calculus/ [3]: https://www.wolfram.com/wolfram-u/courses/mathematics/introduction-to-calculus/ [4]: https://community.wolfram.com/web/luket [5]: https://www.bigmarker.com/series/introduction-to-calculus-wsg56/series_details?utm_bmcr_source=community [6]: https://community.wolfram.com//c/portal/getImageAttachment?filename=wolframu-banner.png&userId=26786 Devendra Kapadia 2024-08-05T20:01:27Z https://community.wolfram.com/groups/-/m/t/1321057 This is a cautionary tale for those who choose Mathematica as the main tool for their work. It is now clear to me that Wolfram has simply abandoned the [Graphs and Networks](http://reference.wolfram.com/language/guide/GraphsAndNetworks.html) functionality area and I am left high and dry. I have no recourse because Mathematica is closed source so there is only so much a user can do to fix or work around problems. Reporting bugs in this particular area has now clearly proven to be useless. Most simply do not get fixed, no matter how serious they are, or how great a hindrance they are to practical use. No new functionality has been added since version 10.0. My colleagues who use other tools (mostly Python and R packages) are more productive at this point, but I have a handicap with those systems because I made the mistake of investing most of my time into Mathematica, and stayed optimistic about it even in the face of the most obvious warning signs. I am writing this post because those people who have not heavily invested in Mathematica, and in particular this functionality area of Mathematica, are not in a position to see this and may fall in the same trap I did. What if the same thing happens to the functionality area that is critical to *your* work? Wolfram Research, of course, will not tell you that they gave up on `Graph`. Thus, after my experience, I think I owe it to the community to warn you about the situation. ---- Some might ask me what specifically is wrong. I have made many posts on this forum about `Graph`-bugs (you only have to search), and I reported many more to WRI. There is always a last straw—it would be pointless to show it. Those who know me will know that I am not writing this admittedly emotional post out of ill will towards WRI. I have betted on Mathematica more than most, and have been advocating for it throughout the years. I even have a network analysis package with ~250 functions. If I am forced to abandon Mathematica for this type of work, then the countless hours that went into this package will all have been in vain. I admit that I am writing this public post partly out of desperation to try to get WRI to either fix the many serious `Graph`-problems, or otherwise publicly state that `Graph` is now abandoned so those of us who have been using it can stop wasting our time. Szabolcs Horvát 2018-04-16T09:54:42Z https://community.wolfram.com/groups/-/m/t/122095 The latest way I have found to use my expensive math software for frivolous entertainment is this. Here's is a way to describe it. [list] [*]1000 dancers assume random positions on the dance-floor. [*]Each randomly chooses one "friend" and one "enemy". [*]At each step every dancer [list] [*]moves 0.5% closer to the centre of the floor [*]then takes a large step towards their friend [*]and a small step away from their enemy. [/list] [*]At random intervals one dancer re-chooses their friend and enemy [/list] Randomness is deliberately injected. Here is the dance... [mcode]n = 1000; r := RandomInteger[{1, n}]; f := (#/(.01 + Sqrt[#.#])) & /@ (x[[#]] - x) &; s := With[{r1 = r}, p[[r1]] = r; q[[r1]] = r]; x = RandomReal[{-1, 1}, {n, 2}]; {p, q} = RandomInteger[{1, n}, {2, n}]; Graphics[{PointSize[0.007], Dynamic[If[r < 100, s]; Point[x = 0.995 x + 0.02 f[p] - 0.01 f[q]]]}, PlotRange -> 2][/mcode] [img]/c/portal/getImageAttachment?filename=OPTfnlfrnds.gif&userId=11733[/img] Thanks to Vitaliy for posting this on my behalf, complete with animations :-) Background: I had read somewhere that macro-scale behaviour of animal swarms (think of flocks of starlings or shoals of herring) is explained by each individual following very simple rules local to their vicinity, essentially 1) try to keep up and 2) try not to collide. I started trying to play with this idea in Mathematica, but it was rather slow to identify the nearest neighbours of each particle. So I wondered what would happen if each particle acted according to the locations of two other particles, regardless of their proximity. The rule was simply to move away from one and towards the other. The contraction (x = 0.995 x) was added to prevent the particle cloud from dispersing towards infinity or drifting away from the origin. I tweaked the "towards" and "away" step sizes to strike a balance between the tendency to clump together and to spread apart (if you make the step sizes equal you get something more like a swarm of flies). With each particle's attractor and repeller fixed, the system finds a sort of dynamic equilibrium, so to keep things changing I added a rule to periodically change the attractor and repeller for one of the particles. The final adjustment was to make the "force" drop towards zero for particles at very close range. This helps to stop the formation of very tight clumps, and also prevents a division-by-zero error when a particle chooses itself as its attractor or repeller. The description of the system as a dance was an attempt to explain the swirling pattern on the screen without using mathematical language. I'd love to see what other "dances" can be created with other simple rules. Simon Woods 2013-09-11T18:31:12Z https://community.wolfram.com/groups/-/m/t/3481794 ![enter image description here][1] Michael Trott was more than a brilliant scientist, he was a mentor, a friend, and a truly unique human being. For those of us lucky enough to work closely with him, his absence leaves a deep void. He brought an irreplaceable blend of curiosity, creativity, and humility to everything he did. Our long meetings, where we'd dive into unconventional ideas in physics and find ways to implement them in Mathematica, often stretched past hours, but no one ever minded. With Michael, even the most abstract idea could spark a new direction, a novel prototype, or an unexplored corner of science. He didn't just think outside the box, he rebuilt it entirely, quietly and kindly. His codes weren't always optimized for performance, but they were original and beautiful. I have never seen anyone so professional in prototyping novel ideas computationally; and this was our joint passion for Mathematica, as we believed it is one of the best tool, if not the best, for this purpose. One can find a few examples of Michael's style of thinking in the [Wolfram Blog][2], [Wolfram Demonstration Project][3], or [Wolfram Community][4]. He was also the author of four seminal books: "[The Mathematica GuideBooks][5]" (four volumes). He had a deep grasp of the history and architecture of Mathematica, with a passion for physics, especially quantum theory, and a genius for applying technology in unexpected ways. Michael Trott joined Wolfram Research in 1994 and was a cornerstone of the company for over 30 years. As Chief Scientist of Wolfram|Alpha, his fingerprints are on thousands of algorithms and innovations, from computational art to physical constants, from parsing human input to building bridges between theoretical physics and computation. The [Wolfram Quantum Framework][6], as a small example, would not have been possible without his support and contributions. Michael was encyclopedic in knowledge, yet endearingly humble. He read hundreds of papers, built massive daily digests on LLMs, mentored researchers across physics, math, and engineering; and still worried whether he had anything "original" to offer before a scheduled talk at the University of Vienna (see the material he'd prepared for this talk from [this link][7]; we even had a dry-run together, to discuss the content repeatedly). His presence was magnetic. He showed up early to Zoom calls (Wolfram Research has many remote employees, including myself, even before COVID pandemic) and sparked thoughtful conversation before meetings began. He didn't just build things but he shared them generously. He brought humanity to everything he touched. Whether discussing quantum fields or life under East Germany's Stasi, he made space for your story too. He helped others grow, quietly and consistently, always leading by example. Toward the end, we spoke about the multiverse; you were certain we'd meet again. In those final days, lying in your hospital bed, we found ourselves deep in conversation about the quantum-to-classical transition and nonlinearities. Thank you, Michael, for everything. You showed so many of us what it truly means to be both a scientist and a human being. [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Screenshot2025-06-18at9.36.32%E2%80%AFPM.png&userId=1539902 [2]: https://blog.wolfram.com/author/michael-trott/ [3]: https://demonstrations.wolfram.com/authors/michael-trott [4]: https://community.wolfram.com/web/mtrott [5]: https://www.amazon.com/stores/author/B001ITTUVM/allbooks [6]: https://resources.wolframcloud.com/PacletRepository/resources/Wolfram/%5C%20QuantumFramework/ [7]: https://amoeba.wolfram.com/index.php/s/Jbrt4q6cYTN7rC7 Mohammad Bahrami 2025-06-19T04:38:05Z https://community.wolfram.com/groups/-/m/t/1985992 This week we will be looking at the following topics: - Tuesday May 26: Dataset - Wednesday May 27: Package Development - Thursday May 28: Workbench - Friday May 29: Useful Tips and Session Wrap Up Please post your questions on this thread and look out for daily challenges. Abrita Chakravarty 2020-05-26T15:21:32Z https://community.wolfram.com/groups/-/m/t/1432072 *NOTE: This is a long page with many images. Scroll through to find some gems.* ---------- ![enter image description here][1] [WordFrequencyData][4] is a nifty instrument for mining oceans of texts and discovering wonderful historical semantic curiosities. **This post is a call for you to share your discoveries of interesting word histories**. Rules are very simple. - Post you discovery as a comment on this thread - Your discovery should be curious histories of some words that can be seen in their WordFrequencyData - Start your comment with a title clearly indicating the meaning of your discovery (use # as the first character to make a title) - Your comment must contain a plot WordFrequencyData of your terms. You can use the function I provide below. Alternatively you can use your own what to visualize WordFrequencyData. - Your comment must contain Wolfram Language code you use to make the plot - Your comment must contain some text explaining why you think the words you found are curious and interesting in your opinion - *If you want to comment on someone's work please click REPLY to his/her specific post so it is clear to what you refer and nested structure of comments is preserved.* Please see comment below for good examples. ---------- ### FUNCTION for PLOTs ---------- Feel free to use this function for your visualizations and change or improve it if you wish. Note what kind of options you can provide to this plot. I tried to limit those options to only very important once, fixing other options to make a nice plot. ClearAll@WordFrequencyPlot; Options[WordFrequencyPlot]= {"YearStart"->1800,"YearEnd"->Now,"Case"->True, "Smooth"->3,"Scaling"->None,"Style"->Automatic}; WordFrequencyPlot[words_,OptionsPattern[]]:= With[{ $data=WordFrequencyData[words,"TimeSeries", {OptionValue["YearStart"],OptionValue["YearEnd"]}, IgnoreCase->OptionValue["Case"]]}, DateListPlot[ MapThread[Callout, {MeanFilter[#,Quantity[OptionValue["Smooth"],"Years"]]&/@ Values[$data],words}], ScalingFunctions->OptionValue["Scaling"], PlotRange->All, PlotTheme->"Detailed", PlotStyle->OptionValue["Style"], FrameTicks->{Automatic,None}, ImageSize->Large, FrameLabel->{"YEAR","FREQUENCY in TEXT"}] ] [1]: http://community.wolfram.com//c/portal/getImageAttachment?filename=ScreenShot2018-09-04at5.02.04PM.png&userId=11733 [2]: http://community.wolfram.com//c/portal/getImageAttachment?filename=ScreenShot2018-08-30at8.19.02PM.png&userId=20103 [3]: http://community.wolfram.com//c/portal/getImageAttachment?filename=ScreenShot2018-09-04at12.48.22PM.png&userId=11733 [4]: http://reference.wolfram.com/language/ref/WordFrequencyData.html Vitaliy Kaurov 2018-08-30T21:41:25Z https://community.wolfram.com/groups/-/m/t/1070264 [Wolfram Language][1] (WL) is a powerful multi-paradigm programing language. There is a set of common mistakes that repeatedly tend to entrap new users. **This is a call to describe such mistakes building a "black-listing" guide for novice coders.** Please consider contributing. I suggest following simple rules (with gratitude adapted from a [similar effort][2]): - One topic per answer - Focus on non-advanced uses (it is intended to be useful for beginners and as a question closing reference) - Include a self explanatory title in header style (example: "# Basic built-in function syntax"; see [syntax guide][3] ) - Explain the symptoms, the mechanism behind the scenes and all possible causes and solutions you can think of. Be sure to include a beginner's level explanation (and a more advance one too, if you can) *Please, use "**Reply**" to a specific comment for structured clarity of nested comments.* ---------- ## Table of Contents - [Basic syntax of built-in functions][4] - [Learn how to use the Documentation Center effectively][5] - [Sorting numerical data and the behavior of Sort][6] - [What does @#(%=<\[!} et cetera mean?][7] - [Consider Reap/Sow Instead of AppendTo][8] - [Alternatives to Reap/Sow][9] - [Case sensitivity and typos][10] - [Numerical vs Symbolic -- What to do when plots are blank][11] - [Import and "CurrencyTokens"][12] [1]: https://www.wolfram.com/language [2]: https://mathematica.stackexchange.com/q/18393/13 [3]: http://community.wolfram.com/groups/-/m/t/270507 [4]: http://community.wolfram.com/groups/-/m/t/1069885 [5]: http://community.wolfram.com/groups/-/m/t/1070285 [6]: http://community.wolfram.com/groups/-/m/t/1070705 [7]: http://community.wolfram.com/groups/-/m/t/1070946 [8]: http://community.wolfram.com/groups/-/m/t/1084289 [9]: http://community.wolfram.com/groups/-/m/t/1164555 [10]: http://community.wolfram.com/groups/-/m/t/1084920 [11]: http://community.wolfram.com/groups/-/m/t/1086929 [12]: http://community.wolfram.com/groups/-/m/t/1086969 Vitaliy Kaurov 2017-04-23T23:54:23Z https://community.wolfram.com/groups/-/m/t/2267653 *MODERATORS' NOTE: We will be displaying the collage of people's images at the top of this discussion. Dear all, please, do post the images of Wolfram things dear to your memories here :-) Thank you, Daniel Carvalho, for a delightful question!* ![enter image description here][1] ---------- Today installing Mathematica 12.3 I notes that there are previous versions installed too in my Linux box: daniel@home:/opt/Wolfram/Mathematica$ ls -l total 28 drwxr-xr-x 7 root root 4096 nov 20 2014 10.0 drwxr-xr-x 7 root root 4096 ago 14 2016 11.0 drwxr-xr-x 7 root root 4096 abr 26 2017 11.1 drwxr-xr-x 7 root root 4096 jun 26 2020 12.1 drwxr-xr-x 7 root root 4096 jan 12 23:20 12.2 drwxr-xr-x 3 root root 4096 mai 13 13:23 12.3 drwxr-xr-x 7 root root 4096 ago 19 2013 9.0.1 It is interesting to see that the older version is around 9 in 2013, and the years of installation for the other releases, according my folders. In fact my first version of Mathematica was 4.0 (1999), for calculus classes in college. In Computer Engineering that time we had 5 semesters of calculus classes, and just the last one we went to the lab to make some more interesting projects applying the theory to practical experiments. The basic calculus classes usually ware just whiteboard, pen and paper, book and exercises. A very traditional engineering college. It was interesting getting the last exercises from lists, the most complex cases, and have it solved immediately!! I can recall that version 6.0 was the most interesting for me, I have used it at master degree. Since version 6.0 I have been publishing lots of [Demonstrations][2] with the [Manipulate][3] function, it is really fun! It got my playing video game timing! :-) In my parents house I found this boxes with my old college stuff: ![enter image description here][4] I went to the Wolfram Summer School in [2007][5] while back in college for the Master in Electrical Engineering, and latter again in [2011][6] for a new research about [NKS][7] computational principles. Latter on I get certified, [Wolfram Certified Instructor][8] Since 2013 I have been organizing the Wofram conference in Brazil with [Mackenzie University][9] team and other friends, by my installations dates, I have used 9.0.1 at the first conference here. In 2021 and 2020 the conf is virtual for safety (remote): [https://www.wolfram.com/events/virtual-conference-br/2020/][10] And now I am very excited with 12.3!! The Mathematica versions history is available at: [https://www.wolfram.com/mathematica/quick-revision-history.html][11] What was your first Mathematica version?? [at0]: https://community.wolfram.com/web/danielscarvalho [Original]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Eew570TWkBEyea5.jpeg&userId=1518234 [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=colmv.jpeg&userId=11733 [2]: https://demonstrations.wolfram.com/author.html?author=Daniel%20de%20Souza%20Carvalho [3]: https://reference.wolfram.com/language/ref/Manipulate.html [4]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Eew570TWkBEyea5.jpeg&userId=20103 [5]: https://education.wolfram.com/summer-school/alumni/2007/carvalho/ [6]: https://education.wolfram.com/summer-school/alumni/2011/carvalho/ [7]: https://www.wolframscience.com/ [8]: https://www.wolfram.com/wolfram-u/instructors/carvalho.html [9]: https://www.mackenzie.br/ [10]: https://www.wolfram.com/events/virtual-conference-br/2020/ [11]: https://www.wolfram.com/mathematica/quick-revision-history.html Daniel Carvalho 2021-05-13T16:49:32Z https://community.wolfram.com/groups/-/m/t/2798101 Join Wolfram U instructors and a cohort of fellow learners in a Daily Study Group series to prepare for the [Wolfram Language Level 1 Certification][1]. We will review various topics that are included in the exam to test your proficiency in Wolfram Language programming. Daily Study Group dates: Feb 13th-17th, 11am-12pm CT (5-6pm GMT) **[REGISTER HERE][2]** ![enter image description here][3] Whether you are a new Wolfram Language user or an expert, join our study group, share your questions and feedback and, finally, take the exam to earn your certification. Don't forget to share your certificate on social media and tag us #WolframCertified [1]: https://www.wolfram.com/wolfram-u/certification/level1/language/ [2]: https://www.bigmarker.com/series/daily-study-group-wolfram-language-certification-prep-wsg35/series_details?utm_bmcr_source=community [3]: https://community.wolfram.com//c/portal/getImageAttachment?filename=wolframu-banner.png&userId=130003 Abrita Chakravarty 2023-01-20T20:14:34Z https://community.wolfram.com/groups/-/m/t/2253852 I realize that I am possibly the only Mathematica user to suffer from existential angst for the product, but still, its worth pausing to ask the question, what is Mathematica for? Meaning, what is its purpose? But for those of you pragmatists tempted to roll your eyes and just get on with using it, let me motivate the question with a chart: ![enter image description here][1] You don't need a model to figure out the long term trend in that time series. And someone, somewhere, in WR needs to be asking the question I am posing in this post, if they are seriously hoping to check that trend and reverse it. Now, let's be fair here. Firstly this is not just a Mathematica issue. For example, here's the comparable chart for Matlab: ![enter image description here][2] So I am not "picking on" Mathematica. Its a general problem for mathematical programming languages. Or perhaps I should say, more accurately, its a challenge for proprietary mathematical programming languages: ![enter image description here][3] Now this "analysis" is of course over-simplistic. It could be, for example, that the downward trend in Mathematica interest is a reflection of a decision by WR to increase prices over time, to maximize profits, i.e. it could conceivably be a *good* thing. But I rather suspect otherwise and instead tend to believe that Mathematica is losing influence and relevance, regardless of whatever I may think of the product. Another response might be: "Of course we are losing market share to license-free, direct competitor products. What's your point?". To which, I suppose, the answer might be: "Are you quite sure that is inevitable? Are there not examples of for-profit products that are so good they are able to maintain market share in the face of cost-free alternatives?". The answer to that question is, of course, yes. But in order to maintain your competitive position you have to be crystal clear in your understanding of what the value proposition is, and why customers will (continue to) pay for your product. Which brings me to the subject of this post: what is Mathematica for? Because unless can answer that question, you can't answer the earlier one. Now I have a theory that the generally held view in WR is that Mathematica is for any kind of programming task you can conceive of. It's a general purpose tool, limited in its capabilities only by your imagination. And at this point we could now queue up a 15 minute informercial featuring examples of applications from Astronomy to Zoology. But just because you *can* do something in Mathematica doesn't mean you should: there are often better alternatives. Mathematica has developed into something like a Swiss Army knife, a general purpose tool you can use for almost any purpose. But, often times what you need is a tool with a specific purpose, like a screwdriver, which will make it much easier to complete the task you have in mind. Let's take a simple example: spreadsheets. I have seen several attempts to get Mathematica to do the kind of thing that Excel can do effortlessly. And the question I always end up asking myself is: "why on God's green earth would anyone in their right mind try to use Mathematica for a task like that?". What is trivial to accomplish in a few seconds or minutes in Excel, typically takes hours of jumping through hoops with Mathematica to achieve a result that is almost always inferior. It's like trying to navigate a freeway in a spaceship, rather than a motor car. Sure, you can do it, buy why?? Another no-no is trying to develop stand-alone software applications in Mathematica. It's extremely hard to do - typically much tougher then using a language designed for that purpose. On the other hand, there are some things that Mathematica excels at, such as: - Mathematics/symbolic logic/symbolic manipulation: superb. Best of breed. - Graphics (including animation) ditto - Documentation. Also superb. Now as good at Matlab, possibly even superior. After that, you could pick a bunch of different application areas in which Mathematica is great. But best of breed? I dont know. Let's take an area I know a little about: time series analysis. prior to 2010, Mathematica was truly awful at handling time series. Basically it didn't. Gradually, over subsequent releases, Mathematica has made enormous strides in this area to the point where it is truly magnificent. For which someone at WL deserves (and I hope has received), several promotions. But despite this, Mathematica is still not best of breed in this area. Why? Because, unaccountably, it is still missing several vital elements of functionality such as Granger causality/ Cointegration and its implementation of important functionality like the Kalman Filter is horribly unintuitive. This shows two things: (i) it is possible for WR to make Mathematica outstanding in almost any area it chooses to. it's just a question of focus. And (ii) to become best of breed, you need to finish the job! By which I mean, provide something close to 99% of the functionality that a professional practitioner in that area would expect to have available. if it chose to, WR could accomplish that in the time series area in a single release, I would guess. The problem, I am suggesting, is that in trying to make Mathematica a product that is "all things to all men", it fails to achieve the status of being indispensable to practitioners in a more limited subset of subject areas. Ok let's go with this conjecture for a moment. Let's wave a magic wand and imagine that we can change Stephen Wolfram's vision about his flagship product, which he has sweated blood over for the last 20-30 years (in other words, this is never going to happen - but its still fun to play the game). What core capabilities would you have WR focus on with the aim of making Mathematica an indispensable product in that area? Here are my choices: (i) Time series & econometrics. Mathematica is so close: just finish the job - it's a no-brainer! (ii) Machine learning. This also means making sure that the GPU capability works as it should, first time and every time. Mathematica still has a way to go here and its a huge area. But I'm sure WR could do it. (iii). Meta-Programming. This one is a BIG stretch. But it just happens that WL may have a huge potential competitive advantage, because the language is itself *computational*. in other words, the building blocks of the language can themselves be manipulated, which is exactly what you need for meta-programming. Try doing that in Python! On this subject I would say that the starting point would be to create WL functionality capable of generating a single line of WL code that is sufficiently complex and interesting to win the Wolfram One-Liner competition. I realize that's a huge challenge and its not just about the difficulty of navigating the terrain of the Wolfram language. It also involves thinking about what "complex" and "interesting" mean, in this context. Think of this as a Turing test, for Metaprogramming capability. Once it's passed, it would open up a floodgate of possibilities, both for WL aficionados but also, critically, for those who don't program in WL, or indeed in any language at all. For reference, check out whats going on in the world of "no -code" application environments. [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=GoogleTrendsMathematica.png&userId=773999 [2]: https://community.wolfram.com//c/portal/getImageAttachment?filename=GoogleTrendsMatlab.png&userId=773999 [3]: https://community.wolfram.com//c/portal/getImageAttachment?filename=GoogletrendsPython.png&userId=773999 Jonathan Kinlay 2021-04-26T16:09:01Z https://community.wolfram.com/groups/-/m/t/1659553 Dear all, inspired by another [great post][1] of [@Anton Antonov][at0] and in particular there by a remark of [@Vitaliy Kaurov][at1] pointing to [the art of knitting images][2] I could not resist trying with Mathematica. Clearly - this problem is crying out loudly for **Radon transform**! ![enter image description here][3] I start by choosing some example image, convert it to inverse grayscale and perform the Radon transform. ClearAll["Global`*"] img0 = RemoveBackground[ ImageTrim[ ExampleData[{"TestImage", "Girl3"}], {{80, 30}, {250, 240}}], {"Background", {"Uniform", .29}}]; img1 = ImageAdjust[ColorNegate@ColorConvert[RemoveAlphaChannel[img0], "Grayscale"]]; {xDim, yDim} = {180, 400}; (* i.e. angles between 1\[Degree] and 180\[Degree] *) rd0 = Radon[img1, {xDim, yDim}]; ImageCollage[{img0, ImageAdjust@rd0}, Method -> "Rows", Background -> None, ImagePadding -> 10] ![enter image description here][4] Every column of the Radon image represents a different angle of projection. So next I separate these columns into (here 180) single Radon images and do an inverse Radon transform on each: maskLine[a_] := Table[If[a == n, 1, 0], {n, 1, xDim}]; maskImg = Table[Image[ConstantArray[maskLine[c], yDim]], {c, 1, xDim}]; rdImgs = rd0 maskImg; ProgressIndicator[Dynamic[n], {1, xDim}] invRadImgs = Table[{ImageApply[If[# > 0, #, 0] &, InverseRadon[rdImgs[[n]]]], -(n - 91) \[Degree]}, {n, 1, xDim}]; These data already represent the angle dependent intensities for backpropagation. Now one just has *somehow* to translate these intensities into discretely spaced lines (because this is the actual task in analogy to the above mentioned knitting ). Here is my simple attempt, which e.g. for 69° gives the following result (I am not really happy with this - there is definitely room for improvement!): ![enter image description here][5] valsAngle[invRads_] := Module[{img, angle, data, l2}, angle = Last@invRads; data = Max /@ (Transpose@*ImageData@*ImageRotate @@ invRads); l2 = Round[Length[data]/2]; data = MapIndexed[{First[#2] - l2, #1} &, data]; {Select[ Times @@@ ({#1, If[#2 > .0003, 1, 0]} & @@@ ((Mean /@ # &)@*Transpose /@ Partition[data, 5])), # != 0 &], angle} (* limiting value of 0.0003 is just empirical! *) ]; va = valsAngle /@ invRadImgs; graphicsData[va_] := Module[{u, angle}, {u, angle} = va; InfiniteLine[# {Cos[angle], -Sin[angle]}, {Sin[angle], Cos[angle]}] & /@ u]; gd = graphicsData /@ va; Graphics[{Thickness[.0003], gd}, ImageSize -> 600, PlotRange -> {{-170, 170}, {-220, 220}}] ... and the result is a bunch of lines: ![enter image description here][6] [at0]: https://community.wolfram.com/web/antononcube [at1]: https://community.wolfram.com/web/vitaliyk [1]: https://community.wolfram.com/groups/-/m/t/1555648?p_p_auth=T7A50bYl [2]: http://artof01.com/vrellis/works/knit.html [3]: https://community.wolfram.com//c/portal/getImageAttachment?filename=ImageOfLines.gif&userId=32203 [4]: https://community.wolfram.com//c/portal/getImageAttachment?filename=img0rd0.jpg&userId=32203 [5]: https://community.wolfram.com//c/portal/getImageAttachment?filename=linesample.png&userId=32203 [6]: https://community.wolfram.com//c/portal/getImageAttachment?filename=ImageOfLines.png&userId=32203 Henrik Schachner 2019-04-13T20:01:08Z https://community.wolfram.com/groups/-/m/t/870444 ## The Original Question ## Last week I attended the Wolfram Tour (which was great). I asked whenever we could expect a new version of Workbench, as the current (public) version 2 is very out dated. They responded that they use a more up to date version internally at Wolfram (with some sort of automatic update system) but this version has not been made public as it would require some effort to create a distributional version of it. The reason that they did not invest in this is probably that Workbench has not got many users, and therefor the effort to create a public version is too great in comparison to the number of users. They advised us to create a public topic on this and ask for support of the community to make this a higher priority at Wolfram. **Please let me (and wolfram) know that you are also interested in a new version of the Wolfram Workbench.** ## To Summarize the Comments ## **What do we miss** - Creating native Mathematica Documentation - Profiler function - Unit Testing (although this is already included in Mathematica 10+, it feels a bit awkward to me to run a nb for unit testing) - IDE to develop large WL programs/packages: (Proper meaning: debugging, refactoring, code hinting, search multiple-files etc.) **Suggested Solutions** - Release (the already internally available) Workbench **[preferred solution]** - Seperate the functionality (Profiler, Documentation tools) from WB and support (for example) the IDEA plugin ## Update from Wolfram (21-okt-2016) ## Not sure if we contributed to this, but Wolfram has released what look like the internally used Wolfram WB plugin. For Instructions how to get it: http://support.wolfram.com/kb/27221. It also looks like this plugin is free to use, so no extra license is required (for now). **Edit 2 november 2016:** I've been working with the new Eclipse Plugin (in combination with Mathematica 11 for 2 weeks now and find that it works really well, have not been able to find mayor errors :) **I want to thank everyone for taking the time to support this post** Frank Martin 2016-06-10T14:47:53Z https://community.wolfram.com/groups/-/m/t/774416 I originally posted this on Stack Exchange, where it was suggested it would more appropriately be posted here. The only "real-world" application that meets the specified criteria offered so far (twice) has been Wolfram Alpha (I am not entirely sure that it meets the second criterion - would you choose to develop WA in WL, if you didn't have a bunch of WL experts and a WL development platform at your disposal?). In any event, I am interested in hearing about other real-life applications.... I have a theory, which I am in the process of writing about in a blog post, that other than in applications in mathematics (symbolic logic), Mathematica's primary usefulness is in encouraging a kind of intellectual dilettantism. (Of course, one man's dilettantism is another man's New Kind of Science: i.e. the speculative endeavors of a fertile, creative intellect might readily be mistaken for actual (scientific) achievement by less agile minds.) I don't want this conjecture to be true: I'm as much a buyer of the hype around Mathematica as the next man. But I have noticed that, in practice, Mathematica somehow fails to live up to its apparently unlimited potential for encapsulating creative thought-product across an almost unlimited span of human intellectual endeavor. In my own work in finance, for instance, it has generally proved much less useful than other products such as Matlab. And, in general, when I look at the examples cited by Wolfram in its "customer stories", my reaction to many of them is: "Sure, you can use Mathematica to do that. But why would you, when there are much better alternatives available?". To take one such customer story from the field of 3D CAD, I don't understand why anyone would *prefer* to use Mathematica for such a task, rather than a specialist product like Solidworks. I am aware of applications where the use of Mathematica is fully justified. In my own work, I have used Mathematica to price complex derivatives products, a field in which it excels. Likewise, I am somewhat familiar with Phil Zecker's work at EQA Partners, where he produced an outstanding risk management solution using Mathematica. In both these cases, however, there is no standard, specialized alternative offering in the field of risk management, as there are, for example, in engineering, CAD, app design, or music. In these areas, it seems to me, Mathematica is like a Swiss Army Knife: sure you can use it to dabble in almost anything; but I have screwdrivers, knives and corkscrews that do a better job for their specific purpose. In any event I am looking for counter-examples of real-world applications to refute my hypothesis about Mathematica. By "real-world" I mean specifically applications in which: (i) money changed hands (e.g. a commercial product was sold, or consulting fee earned) ; and (ii) an alternative solution was considered and Mathematica preferred for specific reasons ("it was the only software we could afford or that was available to tackle the job", is not a valid reason to qualify the application as real-world, according to this definition) Jonathan Kinlay 2016-01-17T16:05:55Z