6.28.1 Top new questions this week

6.28.1.1 Are the diagrams in James Stewart's Early Transcendentals made using TikZ?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=548170

The book has a lot of beautiful vector diagrams like these. 
I think pulling this off in TikZ is difficult so I was wondering whether TikZ was used, or some other software. 
[tikz-pgf]
 

asked by John https://tex.stackexchange.com/landing/r/digest?cta=user&id=217170 10 votes

answered by SchrA~\[Paragraph]dinger's cat https://tex.stackexchange.com/landing/r/digest?cta=user&id=194703 10 votes

6.28.1.2 Making a table for Maxwell's Equations

https://tex.stackexchange.com/landing/r/digest?cta=question&id=548407

I would like to write this in LaTeX. I tried using the array environment but  I think I should use the tabular environment. The problem is the text is outside the margins of the paper. How can I fix  ... 
[tables]
 

asked by Therizinosaurus cheloniformis https://tex.stackexchange.com/landing/r/digest?cta=user&id=211669 9 votes

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 14 votes

6.28.1.3 Recreate EEG waves in pgfplots

https://tex.stackexchange.com/landing/r/digest?cta=question&id=547854

I would like to recreate this image: 
I would like to use pgfplots with math functions so that the waves are mathematically generated. Here is what I got so far: 
\documentclass{article} 
... 
[pgfplots]
 

asked by Pedro https://tex.stackexchange.com/landing/r/digest?cta=user&id=43741 9 votes

answered by SchrA~\[Paragraph]dinger's cat https://tex.stackexchange.com/landing/r/digest?cta=user&id=194703 9 votes

6.28.1.4 Iteratively define a matrix

https://tex.stackexchange.com/landing/r/digest?cta=question&id=548867

I was wondering if there is any way to iteratively define a matrix in LaTeX? 
For example, say I wanted to write the following matrix: 
Of course, I could write this matrix by hand using a bmatrix  ... 
[macros] [matrices]
 

asked by Burnished Sandalwood https://tex.stackexchange.com/landing/r/digest?cta=user&id=181311 6 votes

answered by ZhiyuanLck https://tex.stackexchange.com/landing/r/digest?cta=user&id=201158 6 votes

6.28.1.5 Switch based on whether or not an environment variable is set

https://tex.stackexchange.com/landing/r/digest?cta=question&id=548836

TLDR: Problem: kpsewhich outputs \par for unset environment variables and I do not know how to strip it. 
I was inspired from the question Can I access system/environment variables from LaTeX? For  ... 
[expl3] [latex3] [xparse] [shell-escape]
 

asked by Septatrix https://tex.stackexchange.com/landing/r/digest?cta=user&id=187615 6 votes

answered by Phelype Oleinik https://tex.stackexchange.com/landing/r/digest?cta=user&id=134574 4 votes

6.28.1.6 Bezier curve for a loop

https://tex.stackexchange.com/landing/r/digest?cta=question&id=548659

I would like to enhance the output given by the following code : see the picture below where the end of the arrow is lower and the loop "bigger". 
To do this I need a better control of the Bezier  ... 
[tikz-pgf] [bezier]
 

asked by projetmbc https://tex.stackexchange.com/landing/r/digest?cta=user&id=6880 6 votes

answered by SchrA~\[Paragraph]dinger's cat https://tex.stackexchange.com/landing/r/digest?cta=user&id=194703 7 votes

6.28.1.7 How can I make text appear in the middle of a phantom in math mode?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=548426

I want to make a part of an equation to appear in the center of a (horizontal) phantom. This would be awesome for example for making brackets that are all of the same width and still look natural.  ... 
[math-mode] [spacing] [calculations] [mathtools] [phantom]
 

asked by m93a https://tex.stackexchange.com/landing/r/digest?cta=user&id=51512 6 votes

answered by Vincent https://tex.stackexchange.com/landing/r/digest?cta=user&id=201628 17 votes