You might find these notes helpful:

• https://reference.wolfram.com/language/tutorial/TheInternalsOfTheWolframSystem.html
• https://reference.wolfram.com/language/tutorial/SomeNotesOnInternalImplementation.html

Hi Dave, I created a matrix of scatterplots so you could visualize a scatter plot of every feature against every other feature. You will find the associated code in the lesson notebook at https://www.wolframcloud.com/obj/online-courses/multiparadigm-data-science/visual-exploration.html

Just a Grid of the ListPlots, with individual ListPlots shwoing the scatterplot of sepal length v. sepal width or sepal length v. petal length and so on...

Hope this helps.

I believe I've started to barely grasp the value of Mathematica and the Wolfram Language. 2 months ago I had no clue about the existence of Mathematica or WL, and now I'm completely hooked with the technology, and I didn't know why!. As a newcomer to this arena, I must confess that I believe there's a central omission in all this process of explaining Mathematica or WL..Kind of a "missing basic warning for the newcomer". This training is great in the sense that the "operation" of what is in there is exercised, so one feels accomplishing something real with the language. I believe most people is OK with that, and that not something to blame, as that's practical and useful. But I can't help this feeling of "why they needed to change the way of doing things when creating Mathematica"..it was kind of a permanent question in the back of my mind. Now, to this point..and most by the help of the referenced book provided by Arben y feel the WL like knowledge representation language, where concepts, relations between concepts, transformation between concepts are possible, no matter whether those concepts are mathematical concepts, or not. I feel it now like a "linguistic" tool in the sense that units of meaning can be processed into another units of meaning by transformation rules, I just don't know whether this was "accidental" by the need of processing symbolic transformations, but it is in there. I can't even express my ideas clear here as I'm still figuring out the real possibilities with WL and Mathematica but what is clear to my is that this is a completely / dramatically different animal (if I may use the expression). Sorry for the long "Philosophy" but my point is that somewhere in the introductory stages of the training, would it be great to provide clues on how dramatically different mathematica is and how manage the "learning anxiety" of trying to make Mathematica fits were it will never fit becuase uses way different approaches...

Study Group begins Monday Feb 13. See you there!

thanks Phil.

I caught a personal Wolfram Language misunderstanding just in time! i thought that RuleDelayed was typographically entered with ":->" (i.e., a colon, a dash, and a greater-then sign). It is not! The way to enter RuleDelayed is ":>". I noticed because I was getting a nonsense error and I stopped getting it after fixing my typo (or maybe my thinko).

There were two ways I could have detected my error quicker. One was noticing the syntax highlighting in the Wolfram Notebook when entering the 3 characters. The second was the lack of an entry for ":->" in the help documentation. There is an entry for ":>", but there isn't one for ":->". Aha! That should have been a clue. I'll remember that in the future: if unclear what one of the shorthand combinations means, then type that literal combination into the help docs search bar.

Thanks a lot!

I suggest a paper that the late Joel Moses published back in 2008 on Macsyma and the origins of symbolic computing at MIT. Back in the late 1970s, there were four mighty DEC PDP-10 machines on the 9th Floor of 545 Tech Square. MIT-MC (a DEC KL10) was the host for Macsyma. It was accessible via the ARPANet and was used commercially for research -- a lot of military stuff, but other things, too. Original implementations were in LISP; Moses noted he wanted to do them in assembler. Stephen Wolfram was familiar with Macsyma from his graduate work at Caltech.

Those were exciting times with fast evolution. Dialup terminals in the late 1970s were at 300 baud (30cps) but quickly shifted to 1200 baud. In the 80s, Symbolics started making Lisp Machines, and their Macsyma licenses were a big seller for a few years. After PCs gained computational capabilities, the market pretty well dried up for those big Lisp-specialty machines. It's still hard for my brain to comprehend that today's Raspberry Pi machine with Mathematica can vastly exceed the capability of those behemoth computers.

One note from the lessons this week: Arben frequently speaks of mapping in the Wolfram Language. Mapping is a fundamental feature of LISP (and many other languages). This page shows mapcar() from Lisp. It also shows lambda expressions: the way that one did functional computing in that earlier language. This course is excellent for reminding one of the timeless concepts from computation learned many years ago.

Thank you. I downloaded the file and entered the questions except for the last one (the last button was unclickable).

Hi everybody, I've added the collected Q&A to the downloads folder—this notebook consists of all of the questions and answers from the Q&A panel during the sessions. Luke answered basically every question, but I've added a few answers where they were missing.

I've also added the filled-in "survey" notebook, where I've answered all of the "What would you like to see covered?" questions that you all had. Please do take the time to check out this notebook!

I hope this helps Jonathan... It's maybe only a particular way to propose questions with several sections (Section 1, 2 and 3..in the case of your image). The tinny square maybe looks like something didn't load in the browser...but it's actually ok. I had the same impression the first time I saw it, but in the end it makes sense.

Dear Arbita, I took a few Wolfram U classes and enjoyed them. All classes included quizzes and, some of them, the additional sets of problems. Answering the questions, solving the problems, and attending the classes was always sufficient for receiving class certification. How is "Wolfram language certificated" different? How is it related to those certificates? All the best. Michael

I'm a student in the class, too. The Notebooks are in https://amoeba.wolfram.com/index.php/s/mTxiwj3JmLiLbFY . There are 4 folders -- one for each day.

The prerecorded video presentations appear to come from "The Wolfram Language: Fast Introduction for Programmers".

The links were announced in the video today, but they were not announced at the beginning of the presentation. I opened the Bigmarker recording link and skipped to about 80% of the way into the video. All of the links were then visible on the "chat" window of the replay. You open up chat in the replay by hitting the "chat replay" button near the lower right corner of the Bigmarker replay session.

HTH.

I'm new to Wolfram Technologies, and I'd like to learn resources from "behind de scenes" related to the language. I see most of the presentations are focussed on "operation" of sets functions, but, is there any reference explaining the composing concepts and architectural elements of Wolfram Language?

First of all, many thanks for the excellent lecture on ML. It and the interactive approach of Mathematica gave me a kickoff finally to start something practical on my own.

Unfortunately, it was no success. Can someone help me? The notebook is attached.

Attachments:

936239898.nb

Removing the error

Abrita,

In your "Classification" notebook of the second day session there is a plot with "A visual exploration using a scatter plot matrix that compares each of the four features against the others shows some separation between the species based on the features." (see screenshot).

I can't reproduce the plot somehow. I understand that the sepal- and petal- length and width have been plotted on the y-axis, but what parameter did you use for the x-axis?

Attachments:

Screenshot 2023-...jpg

This page has information about the various certification options available for Wolfram Language skills: https://www.wolfram.com/wolfram-u/courses/wolfram-language/

Yes, that shouldn't be a problem. The only caveat is: Candidates may request this assessment up to three times within a six-month interval.

Thank you.

This page has information about the various certification options available for Wolfram Language skills: https://www.wolfram.com/wolfram-u/courses/wolfram-language/

That page contains links for the Wolfram Language L1 Certification, but also for the Mathematica L1 Certification. What's the difference? Is there value in taking the Mathematica test, too?

I'm guessing this is a reflection of a shift away from the word "Mathematica" to "Wolfram [xxx]", and that the material is essentially the same. Since I usually learn something when taking quizzes here, I think it would be a good idea.

The name-change to "Wolfram Language" is useful. For better or worse, it's far easier to get useful results when searching on "wolfram [xxx]" than "mathematica".

Oh! ..this is excellent!. Thank you very much!

I just submitted my exam for graded and passed. But I would love to know which ones were marked wrong and why. I worked each problem in a separate notebook and thought I would get 100%. Is there a way to find out?

Thanks. --Glen

Hi;

After completing the exam, how do you find/obtain the certificate?

Thanks,

Mitch Sandlin

Upon clicking the button "Grade my Exam" at the bottom, it only takes a moment or two for the results to come back. The score is published in a box and there is a link with simple instructions to claim your certificate if you've passed the exam. Once generated, you can download the certificate to your computer.

Hi Glen;

I took and passed the exam on Wednesday, but I don't recall seeing the other button to claim the certificate and consequently didn't press it. So, since I didn't press the button to claim the certificate, how do I go about downloading the certificate to my computer?

Thanks,

Mitch Sandlin

Any takers on this question?

Thanks!

Where is the materials folder with all of the questions from the students?

This did not work for me.

nb2 = NotebookOpen[<URL of my cloud-quiz notebook>];

NotebookSave[nb2, "/Users/pae/downloads/bugg2.nb"];

I wound up with a file "bugg2.txt" in the downloads dir.

This is not a show-stopper for me. It would be nice but is not essential to download a copy. Does it work for you to download a quiz from the Wolfram Cloud and save to your desktop?

Thanks Michael,

I appreciate the advice. I'm going to try again today.

I also completed the exam over the last weekend (twice) and clicked on the “Grade Me” button. Nothing happed either time. What should I try? Thanks to all for an outstanding course. Cheers!

This happened to me. I just filled out the answers I had saved locally, clicked "Grade my exam" again, and I got my grade. I might have clicked the Grade button a couple of times -- with a 10 second pause between clicks.

I presume the whole clear-the-exam-form thing happens when the client loses connectivity to the Wolfram Cloud Server. It looks like a rather squirrelly design; it wold be nicer if the answer-selecting functionality happened locally and a new connection was established when you attempted to submit your exam for grading. Maybe Wolfram is paranoid that someone could manipulate something if the code were running on your local PC. So many things are delightful in the Wolfram computation environment; this one is the opposite.

I guess the Wolfram Research US crew is off participating in President's Day celebrations today.

The Q&A digest will be uploaded to the same folder that contains all the notebooks for this study group series.

Sorry it seems we need CloudObject in thereL

NotebookOpen[CloudObject[<url of your cloud notebook]]

IOh...there's a Ram there also!..my mediocre brain!!

There are some images and graphics in there, so don't give me too much credit :)

Where is this famed download folder? I never get any notifications about it.

I get the reminders but I never get the links to download folder.

No problem!

Hi, all.

When I try to open the Level 1 certification exam, all I see is a confusing mess. I've tried opening the exam on different browsers, but the display is the same. Any suggestions?