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# [WSG21] New Intro to Wolfram Language Daily Study Group

Posted 2 years ago
 We're starting a new Daily Study Group for new users of Wolfram Language! If you'd like to learn to program in Wolfram Language with a combination of short lessons, poll questions to review key concepts, practice problems and Q&A, this is the group for you! We'll be working through the Elementary Introduction to Wolfram Language book by Stephen Wolfram with lots of interactive examples. A certificate of program completion will be awarded to participants who attend online sessions and pass quizzes. A list of daily topics can be found on the Daily Study Groups page. The study group sessions include videos and reading materials for the course and time for discussion and Q&A. About This Study Group: Learn the Wolfram Language and modern computational thinking from Stephen Wolfram's book with veteran Wolfram Language instructor and developer David Withoff and Wolfram instructional designer and technologist Rory Foulger. No prior programming knowledge is required. Sessions include short lessons, poll questions to review key concepts, practice problems and Q&A. A certificate of program completion will be awarded to participants who attend online sessions and pass quizzes. Study Group sessions run daily, Monday through Friday. This Study Group begins Monday, March 21, 2022.
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Posted 2 years ago

Half way through week 1! How are we enjoying the class so far? What have you learned? What's been hard or surprising for you?

Here are some of the things we've created together in the last couple of days:

Posted 2 years ago
 Why does an association with 2 rules behave differently than an association with one rule in this example:In[98]:= {Reverse[<|a -> {2, 3}, b -> {4, 5}|>, {2}], Reverse[<|a -> {2, 3}|>, {2}]}Out[98]= {<|a -> {3, 2}, b -> {5, 4}|>, <|a -> {2, 3}|>}
Posted 2 years ago
Posted 2 years ago
 My contribution is from a fav Jazz Art from the National Museum of American History, LeRoy Neiman's Big Band
Posted 2 years ago
Posted 2 years ago
Posted 2 years ago
 Is it one of the 17 solutions for the fruits roller?
Posted 2 years ago
Posted 2 years ago
Posted 2 years ago
 Thank you to all who have been participating in the study group so far. As noted by Rory in today's session, Lesson 10 of the course is your homework for the evening: https://www.wolfram.com/wolfram-u/an-elementary-introduction-to-the-wolfram-language/10-images.en.htmlYou will need to be logged in with your Wolfram ID to directly enter the course, otherwise you directed to sign in to continue.
Posted 2 years ago
 beautiful!
Posted 2 years ago
 this is awesome, I love the triangles!
Posted 2 years ago
 very cool!
Posted 2 years ago
 nice! I love that you combined our learning on manipulate with this project!
Posted 2 years ago
 Me too, although now i see the missed opportunity for the nice joke "I love squares"
Posted 2 years ago
 haha true!
Posted 2 years ago
Posted 2 years ago
 Is anyone else having a problem going to the link for Quiz 1?. See attachment for the returned error. I get this error using both Chrome and Safari browsers. I get the same error when I try to open "An Elementary Introduction to the Wolfram Language". Attachments:
Posted 2 years ago
 Is there a better way to turn a list of associations into a single association than is illustrated in the following example? ((In Mathematica, the Entity[...] entries are the usual icons, which are more readable.)assocList = {<|Entity["City", {"Kabul", "Kabul", "Afghanistan"}] -> "Kabul, Afghanistan"|>, <|Entity[ "City", {"Maarianhamina", "Aoland", "Finland"}] -> "Maarianhamina, Aland Islands"|>, <|Entity[ "City", {"Tirana", "Tirana", "Albania"}] -> "Tirana, Albania"|>}; Association@Flatten@Normal[assocList]Here is the output:<|Entity["City", {"Kabul", "Kabul", "Afghanistan"}] -> "Kabul, Afghanistan", Entity["City", {"Maarianhamina", "Aoland", "Finland"}] -> "Maarianhamina, Aland Islands", Entity["City", {"Tirana", "Tirana", "Albania"}] -> "Tirana, Albania"| >
Posted 2 years ago
 Hi! Merge[assocList, Total] Should do the same thing :)
Posted 2 years ago
 very cool! I haven't seen this one before, nice job
Posted 2 years ago
 nice!
Posted 2 years ago
 Hi Gerald,This is probably the easiest way if there are no duplicate keys Association@assocList 
Posted 2 years ago
 I have send you an reply email Regarding the Issues with quiz
Posted 2 years ago
 I Made you a reply gmail yesterday regarding the issues with quiz with some pictures
Posted 2 years ago
 I do not see your email. I have checked gmail, inbox, spam, junk & deleted items. Please resend it.
Posted 2 years ago
Posted 2 years ago
 New Intro to Wolfram Language Daily Study Group (begins March 21!)
Posted 2 years ago
 Hi I'm in process of my review for the 5 Quiz Marathon. I think it is reasonable to ask whether each Quiz covers a certain portion of the Course? Said Info would make my prep more efficient, since we covered and entire Book in 2 weeks...I would expect the 1st Quiz would cover perhaps the first few Days, while perhaps Quiz 5 might be expected to cover the entire course? or is there some other portioning that you would be willing to share?I would happily accept the answer in the form of a Wolfram Language Association Assignment that would lead to a set {<| "Quiz 1" -> {1, 3}, "Quiz 2" -> {3,5}, ... or some such association of Quiz # -> {Day1, Day2}Thanks In Advance
Posted 2 years ago
 When I downloaded the Course Materials at the End of the Last Day of the Course, there does not seem to be any of the Week 3 notebooks. Week 1 and Week 2 notebooks are there, but not Week 3. There seems to be no new files added since Apr 1 (hmmm, All Fools Day?).Were any new files added more recent than Apr 1, and somehow I'm downloading the wrong cache of files?
Posted 2 years ago
 A solution for the Fruit Roller using the functions Tally and Switch.
Posted 2 years ago
 The fruit roll problem:The theoretical probabilities, P, of Winner, Loser, and Try again are:P(W)=5/5^3=1/25=4%, P(L)=(5 * 4 * 3)/5^3=12/25=48%, and P(T)=1-(P(W)+P(L))=1-52%=48%. Attached file FruitRoll_GDorfman_9apr22.nb contains two items:(1) An alternative module for the problem that avoids using Which, Switch, etc., together with code to output 30 executions of it(2) A simple Monte Carlo analysis that supports the theoretically computed probabilities. Attachments:
Posted 2 years ago
 There appears to be a bug in Quiz 2: Problem 8 My email is: jsauvage@jpl.nasa.gov
Posted 2 years ago
 I found at least one answer for 2 of the Questions on Quiz 2 was "close" to being correct, but actually all of the offered answers for these 2 Questions still contained some errors where they would not evaluate properly. I'm guessing that each person receives a set of different Questions on their Quiz 2 that they are confronted with; the Questions being extracted at random from a Pool of Test Questions (a New Wolfram Language Function: RandomQuestion[10]??).Anyway, I'm not particularly bothered, as I passed it anyway, but would like to describe the particulars so as to contribute to an improvement in the Pool of Questions. For obvious reasons, I realize it might be best not to discuss this openly in this forum.Is there an email that I can send the 2 Questions, and what I believe is incorrect as to the offered answers?Also, it is suggested -in the Quiz- that to get the Certificate, you must get 60% score...I'm thinking that what is meant is the the score should be 60% or greater, otherwise I would have had to go back and change 4 of my answers to reduce my score back to 60%?Overall, it's been Fun so Far. And I do appreciate the effort that the Gang at Wolfram has made in offering this course.
Posted 2 years ago
 TE MESSAGE below is displayed. The date displayed in the Wolfram quizz site is 04.12.2032 4:57PM ????? Well, very disapointing, Marcos Attachments:
Posted 2 years ago
 Please, correcting: "Dear Instructors: I have understood that QUIZZES WERE due today April 14th, 2022." in fact, today is due day: April 15th 2022. Best wishes, Marcos
Posted 2 years ago
 Is anyone else having issues with the "Check My Solution" functionality in the exercise notebooks? Specifically, for Section 10 (images), "Check My Solution" is always telling me it is incorrect even though I have confirmed my solution is correct according to the exercise answers given at the end of the book. It's also spitting out an error.Here's a screenshot:
Posted 2 years ago
 Yes I have also encountered that at times, especially if you copy & paste something into the cell instead of entering a solution entirely by hand. I'm not sure, but there may be other characters that get entered into the cell that are perhaps control characters that are not visible? Sometimes, I just ignored it knowing that I had the correct solution, sometimes, I cleared the cell and manually entered the content and that seemed to fix the problem.
Posted 2 years ago
 The "Exercises" worked just fine with me, no exception. But the problem occured when I took the quizzes. They were zeroed when questions were clearly right. There seems to be some issues with timing the deadline. It seemed to me that the due date would be the last time to take the quizzes but somehow they were accepted only until the day before. Anyway, just a misinterpretation of my part.
Posted 2 years ago
 Thank you James and congratulation for the successful completion of the Study Group !!! See you in next classes to come! Best wishes, Marcos
Posted 9 months ago
 Hi Eric, my name is Ricardo, and I am working though the exercises on chapter 10. I am experiencing the same problems in the first two exercises as you. Did you find a solution? Thank you! Ricardo
Posted 9 months ago
 Hello Ricardo and Erik, Thank you for your feedback, we looked into the exercises noted and found that they were older version of the notebooks. You fix this by going to https://www.wolframcloud.com/browse#Home/Copied%20Files and deleting the exercise notebook, then refreshing the page. Please email us at wolfram-u@wolfram.com if you experience further issues.
Posted 9 months ago
 Good morning Cassidy,Thank you for looking to my post regarding the exercises of chapter 10. Exercises 10.7 to 10.11 (the ones that don't need a picture) are working fine, but the rest of them (the ones with Steve's picture) don't show any answer when I press the "Check my solution" box. I did what you suggested on your post.Kind regards,Ricardo