9.12.1 Top new questions this week

9.12.1.1 How to draw this diagram by TikZ in LaTeX

https://tex.stackexchange.com/landing/r/digest?cta=question&id=675478

I would like it if someone can help me to draw the enclosed diagram? 
This is the code that I made: 
\tikzstyle{block} = [draw, fill=cyan, regular polygon, 
minimum height=3em, minimum width=6em] 
\... 
[tikz-pgf]
 

asked by Carl Gauss https://tex.stackexchange.com/landing/r/digest?cta=user&id=290278 Score of 8

answered by Qrrbrbirlbel https://tex.stackexchange.com/landing/r/digest?cta=user&id=16595 Score of 9

9.12.1.2 How to draw a 3D sphere and a 3D cone for Spherical coordinates

https://tex.stackexchange.com/landing/r/digest?cta=question&id=676181

I'm trying to replicate this figure: 
Right know, I have this code: 
\begin{figure}[H] 
\centering 
\begin{tikzpicture}[yzx, scale = 0.9] 
\draw[->] (0,0,0) -- (5.5,0,0) node(x)[left]{$... 
[tikz-pgf] [tikz-trees] [3d] [tikz-3dplot] [tikz-3d]
 

asked by Peluche https://tex.stackexchange.com/landing/r/digest?cta=user&id=262923 Score of 7

answered by Juan CastaA~+-o https://tex.stackexchange.com/landing/r/digest?cta=user&id=231368 Score of 10

9.12.1.3 Square roots look ugly with high and long expression

https://tex.stackexchange.com/landing/r/digest?cta=question&id=675978

Example: 
\documentclass{article} 
\begin{document} 
\ 
\begin{equation}v=\sqrt{\frac{2k\left(\frac{qQ_1}{r_i}+\frac{qQ_2}{r_i}-\frac{qQ_1}{r_f}-\frac{qQ_2}{r_f}\right)}{m}}\end{equation} 
\end{document} 
... 
[equations] [sqrt]
 

asked by Joy Jin https://tex.stackexchange.com/landing/r/digest?cta=user&id=290606 Score of 6

answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 7

9.12.1.4 Define NewExpandableDocumentCommand whose name is in a macro

https://tex.stackexchange.com/landing/r/digest?cta=question&id=676102

If a macro or an argument (say #1) contains some strings, say Mystring, I can create a macro \PrefixMystring{}{} using something like: 
\expandafter\newcommand\csname Prefix#1\endcsname[2]{ 
the ... 
[latex3] [xparse]
 

asked by tobiasBora https://tex.stackexchange.com/landing/r/digest?cta=user&id=116348 Score of 5

answered by gusbrs https://tex.stackexchange.com/landing/r/digest?cta=user&id=105447 Score of 5

9.12.1.5 Spiral text in Cyrillic

https://tex.stackexchange.com/landing/r/digest?cta=question&id=675994

I want to get a spiral as shown in this post: 
Text spirals with TikZ 
at the same time, I need to use Cyrillic: 
"Eth\237N~\200Eth,Eth\274Eth\[Micro]N~\200: Eth\275N~\203Eth\[Paragraph]Eth\275Eth\276 Eth\275EthDegreeEth\[DownQuestion]Eth,N~\201EthDegreeN~\202N~\214 Eth\[DownQuestion]Eth\276 N~\201Eth\[DownQuestion]Eth,N~\200EthDegreeEth>>Eth, N~\215N~\202Eth\276 Eth\[DownQuestion]N~\200Eth\[Micro]Eth\264Eth>>Eth\276Eth\[Paragraph]Eth\[Micro]Eth\275Eth,Eth\[Micro]." 
I found a way to change ... 
[cyrillic] [spiral]
 

asked by Eth\220Eth\275N~\202Eth\276Eth\275https://tex.stackexchange.com/landing/r/digest?cta=user&id=218163 Score of 5

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

9.12.1.6 How to use full-string conditionals in latex

https://tex.stackexchange.com/landing/r/digest?cta=question&id=675895

I want some conditional paragraphs in my document.  I've been following chapter 13.2 of "Tex by Topic", but I've run into limitations. 
\documentClass{report} 
\def\option{a} 
\begin{document}... 
[macros] [tex-core] [conditionals]
                                                                                  

                                                                                  
 

asked by Stewart https://tex.stackexchange.com/landing/r/digest?cta=user&id=205379 Score of 5

answered by koleygr https://tex.stackexchange.com/landing/r/digest?cta=user&id=120578 Score of 6

9.12.1.7 Generate a pdf for each language

https://tex.stackexchange.com/landing/r/digest?cta=question&id=675597

I have this document: 
\documentclass{report} 
\usepackage[english, spanish]{babel} 
\begin{document} 
\selectlanguage{english} 
\section*{Hello, world!} 
This is a document written in English. 
\... 
[pdf] [babel] [jobname]
 

asked by Alex Segura https://tex.stackexchange.com/landing/r/digest?cta=user&id=290396 Score of 5

answered by Dai Bowen https://tex.stackexchange.com/landing/r/digest?cta=user&id=106162 Score of 5