Just another run at the veneer of logic (and LaTeX) in nonsensical replies from ChatGPT!
versus
Archive for LaTeX
anything and everything and ChatGPT
Posted in Books, Kids, Statistics, University life with tags AI, artificial intelligence, chatbots, ChatGTP, Jensen's inequality, language processing, LaTeX, OpenAI, Turing's test on December 21, 2022 by xi'anstuck exchange
Posted in Books, Kids, Statistics with tags basic probability, cross validated, Haleh Mashian, LaTeX, mathbb, notations, simulation, U-turn on August 16, 2022 by xi'an
Made an attempt at explaining on X validated why simulating from the joint was equivalent to simulating from the marginal then from the conditional. Unfortunately failed as I could not fathom where the OP’s difficulty was. It seems it started at defining what drawing from a distribution meant… Then someone came by asking why I was writing the exponential in this unusual way (this was a barred E for expectation) and whether or not the “thin hollow rectangle” (a barred I for indicator) was standing for identity, that is
Reaching a point of incomprehension from which I could not recover…
page overflow
Posted in Books, Kids, Statistics with tags algebra, CNRS, conjugate normal model, cross validated, LaTeX, MathJax, Overleaf, PLMlatex on March 17, 2021 by xi'an
wrong algebra for slice sampler
Posted in Books, Kids, R, Statistics with tags cross validated, George Casella, Introducing Monte Carlo Methods with R, Japanese translation, LaTeX, logistic regression, lost in translation, Pratique R, R, slice sampler, Springer-Verlag, typo, Use R on January 27, 2021 by xi'an
Once more, and thrice alas!, I became aware of a typo in our “Use R!” book through a question on X validated from a reader unable to reproduce the slice of a basic 2D slice sampler for a logistic regression with coefficients (a,b). Indeed, our slice reads as the incorrect set (missing the i=1,…,n)
when it should have been
which is the version I found in my LaTeX file. So I do not know what happened (unless I corrected the LaTeX file at a later date and cannot remember it, but the latest chance on the file reads October 2011…). Fortunately, the resulting slices in a and b and the following R code remain correct. Unfortunately, both French and Japanese translations reproduce the mistake…
on-line course
Posted in Kids, pictures, Statistics, University life with tags courses in English, drawing tablet, Huion, LaTeX, MathJax, multiple choice question, on-line course, pdf, questionnaire, teaching, Université Paris Dauphine, xournalpp on September 4, 2020 by xi'an
Since this teaching semester is 100% on-line in Paris Dauphine for the third year students, I started last Monday to teach my statistical modelling course from my office on my computer. Using a Teams connection with the 180⁺ students, sharing my slides or my webcam with them, and writing on a Huion drawing tablet to write on the pdf slides (or on Teams whiteboard). I found the most convenient way to write on the slides was via Xournalpp. From my end of the exchange, the class went on rather smoothly, with students interacting about the practical and contents of the course. As I have also recorded my lectures (in August), and hope the students to first go through the recordings, I will see next time how much effort they have put into assimilating the material, as the on-line class will mostly concentrate on questions and applications. I also hope to have a quick multiple choice question at the end (or beginning?) of each class, but am still fishing for an interface that would (a) handle LaTeX or MathJax (b) shuffle questions from a pool of questions so that each student gets a different question (or thinks so) and (c) store the outcome of the test. Any suggestion welcome!
Xi'an's Og 