8.21.1 Top new questions this week

8.21.1.1 How to draw an irregular closed shaped in LaTeX

https://tex.stackexchange.com/landing/r/digest?cta=question&id=638549

I have the following code in LaTeX that produces a circle in a square with arrow lines, but I want to replace the circle with an irregular shape like the molecule in the image. How can I go about it? 
\... 
[tikz-pgf]
 

asked by user3307971 https://tex.stackexchange.com/landing/r/digest?cta=user&id=106394 Score of 10

answered by kabenyuk https://tex.stackexchange.com/landing/r/digest?cta=user&id=204924 Score of 9

8.21.1.2 Trying to plot y^2 = x^3 + 5 (tikz)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=638994

I'm trying to plot an elliptic curve but it leaves a weird "gap". I have tried different values for the domain but the gap remains. 
\begin{tikzpicture} 
\begin{axis}[ 
... 
[tikz-pgf]
 

asked by Lookingforhelp https://tex.stackexchange.com/landing/r/digest?cta=user&id=267424 Score of 7

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 10

8.21.1.3 How to avoid warning on \ifsomething \end document  \fi

https://tex.stackexchange.com/landing/r/digest?cta=question&id=638923

This is truly an unimportant curiosity/itch question.  I have chapters in a book that can compile either within the whole book or by themselves.  At the end, the files have statements like: 
\... 
[conditionals]
 

asked by ivo Welch https://tex.stackexchange.com/landing/r/digest?cta=user&id=25779 Score of 7

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 4

8.21.1.4 diagram composing function

https://tex.stackexchange.com/landing/r/digest?cta=question&id=638411

I'm trying to make a typical composing-function diagram and I've saw a few posts, but I cannot make it yet as I'd like. In this picture I show what I attempt to make 
But the most I got is 
As you can ... 
[tikz-pgf] [diagrams]
 

asked by Suiron https://tex.stackexchange.com/landing/r/digest?cta=user&id=216277 Score of 7

answered by SebGlav https://tex.stackexchange.com/landing/r/digest?cta=user&id=204164 Score of 7

8.21.1.5 Wrapping a command (parametrically) - csname woes

https://tex.stackexchange.com/landing/r/digest?cta=question&id=638635

I would like to "wrap" an existing command with another command. 
For example, suppose that there is one command 
\cmda 
I would like that each time this is called we end up executing: 
\... 
[patching] [renewcommand] [csname] [expandafter]
 

asked by Andrea Censi https://tex.stackexchange.com/landing/r/digest?cta=user&id=14813 Score of 6

answered by campa https://tex.stackexchange.com/landing/r/digest?cta=user&id=82917 Score of 6

8.21.1.6 How to Extract the Three First Letters of Current Month in French without Accented Characters?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=638351

Is there a way to extract the 3 first letters of the current month in French but WITHOUT acented characters AND with the first letter capitalized - e.g. Fev for FA~(c)vrier (February in english) - AND ... 
[strings] [french] [date] [datetime2]
 

asked by SylvainRigal https://tex.stackexchange.com/landing/r/digest?cta=user&id=262081 Score of 6

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 6

8.21.1.7 How to convert this Mathematica code to pgfplot?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=638864

I have a Mathematica code which I would like to convert into pgfplot only to obtain the contours so that I can use the 'TikZ' version with other drawings made using TikZ. I actually am not familiar ... 
[tikz-pgf] [pgfplots] [wolfram-mathematica]
 

asked by SolidMark https://tex.stackexchange.com/landing/r/digest?cta=user&id=242742 Score of 5

answered by hpekristiansen https://tex.stackexchange.com/landing/r/digest?cta=user&id=8650 Score of 5