7.65.1 Top new questions this week

7.65.1.1 How can I recursively update a command in a 'for' loop?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=619578

I am trying to plot sums of functions, with parameters specified by the user, using pgfplots. 
\documentclass{article} 
\usepackage{pgfplots} 
\newcommand{\myfun}[2]{(cos(#1*\x) + sin(#2*\x))} 
\begin{... 
[tikz-pgf] [pgfplots] [macros] [pgffor]
 

asked by Rushi https://tex.stackexchange.com/landing/r/digest?cta=user&id=110602 11 votes

answered by Ulrich Diez https://tex.stackexchange.com/landing/r/digest?cta=user&id=118714 5 votes

7.65.1.2 How can I draw the surface f(x,y)=x^2+y^2 like my picture?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=619390

I have been trying to get this surface drawn using pgfplot, but I can't make it look like the picture I'm trying to make the code for. 
\documentclass{standalone} 
\usepackage{pgfplots} 
\begin{document} 
... 
[pgfplots] [3d] [asymptote]
 

asked by Jakob Kruse https://tex.stackexchange.com/landing/r/digest?cta=user&id=154628 7 votes

answered by hpekristiansen https://tex.stackexchange.com/landing/r/digest?cta=user&id=8650 9 votes

7.65.1.3 TikZ callouts: How to prevent sharp pointer tip from being rounded?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=619450

When drawing a corner-rounded callout box, the pointer tip is rounded as well. 
Here is an MWE: 
\documentclass{standalone} 
\usepackage{tikz} 
\usetikzlibrary{shapes.callouts} 
\begin{document} 
\begin{... 
[tikz-pgf] [callout]
 

asked by ZHANG Wuji https://tex.stackexchange.com/landing/r/digest?cta=user&id=101799 7 votes

answered by CarLaTeX https://tex.stackexchange.com/landing/r/digest?cta=user&id=101651 1 vote

7.65.1.4 Gaussian on an oblique ray with Tikz

https://tex.stackexchange.com/landing/r/digest?cta=question&id=619317

I try to draw a generic Gaussian over a ray, to indicate a possible generic trend. At the moment I have managed to draw both the ray and the Gaussian, but I can't get it to lay on the ray, as changing ... 
[tikz-pgf] [tikz-styles] [graphs] [draw] [gauss]
 

asked by Alessandro Boccalari https://tex.stackexchange.com/landing/r/digest?cta=user&id=254809 7 votes

answered by Juan CastaA~+-o https://tex.stackexchange.com/landing/r/digest?cta=user&id=231368 11 votes

7.65.1.5 How to Assign the Numbers Automatically in This Enumerate Environment

https://tex.stackexchange.com/landing/r/digest?cta=question&id=619376

Consider 
\documentclass{book} 
\usepackage{tcolorbox} 
\newtcbox{\blackbox}[1][]{nobeforeafter, notitle, %sharpcorners, 
colframe=black, 
colback=black, 
top=4pt, 
left=5pt, 
right=... 
[numbering] [listings] [enumerate] [tcolorbox] [enumitem]
 

asked by Samuel Bowditch https://tex.stackexchange.com/landing/r/digest?cta=user&id=225746 6 votes

answered by CarLaTeX https://tex.stackexchange.com/landing/r/digest?cta=user&id=101651 12 votes

7.65.1.6 siunitx causing missing $ error

https://tex.stackexchange.com/landing/r/digest?cta=question&id=618998

I am trying to typeset this table, but I keep running into the following error: 
! Missing $ inserted. 
<inserted text> $ 
l.34 ...{Global data expressed in \qty{e10}{\gram} 
... 
[tables] [siunitx]
 

asked by Miloop https://tex.stackexchange.com/landing/r/digest?cta=user&id=221092 6 votes

answered by Joseph Wright https://tex.stackexchange.com/landing/r/digest?cta=user&id=73 3 votes

7.65.1.7 New fraction line definition

https://tex.stackexchange.com/landing/r/digest?cta=question&id=619029

1) How can we control the vertical alignment of this fraction line? 
2) I'm also looking for a way to make the ends of the fraction line round. 
I know doing these will cause problems. I'm just ... 
[fractions]
 

asked by Pitaya88 https://tex.stackexchange.com/landing/r/digest?cta=user&id=251509 6 votes

answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 5 votes