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TeX
[Happy Hat Day](https://www.daysoftheyear.com/days/hat-day/) 
"Value added" services have always been accepted and permitted. For example, the PCTeX and BlueSky implementations of TeX, which involved considerable work to accomplish, were both recognized and accepted by Knuth. I'd say that Overleaf's services are acceptable under this criterion -- what is provided here is use of facilities and enabling of cooperative work by subscribers, as well as support by knowledgeable individuals paid for their work. I don't know the details of the tool based on TikZ, so won't try to judge.
Happy rubber duckie day to everybody! https://www.daysoftheyear.com/days/rubber-duckie-day/
I don't see it is different from building a program in C language for example then sell it. You don't have to pay to learn C but you can legally monetize your knowledge of it.
I think it is legally allowed. If it is morally the right thing to do is another question, but recall also that Overleaf is basically doing the same: they sell online compilation LaTeX services. Different people have different views on whether this is something one should do. My personal take is that Prof. Knuth and others offer us all these tools for free and it is at least questionable if someone provides services entirely reliant on these free tools for profit.
I heard someone base on TikZ to create a tool, then sells this tool. Is this allowed?
[Happy Milk Day!](https://www.daysoftheyear.com/days/milk-day/) 
Is there anyone who has enough knowledge with both linux and windows to help me with my question https://tex.stackexchange.com/q/578144/2288 before importing it here?
It is not a LaTeX package but just Mathematica. https://www.wolfram.com/mathematica/
In my humble opinion there is only one package which deals reliably with most mathematical operations, and this is Mathematica. The LaTeX support of this package has considerable room for improvement, but at least in principle there is some.
Does anyone know a package that enables doing complex mathematical operations (except sage) without the need for external compilation from another software?
btw A happy and warm year to all of you.
[link](https://adityam.github.io/context-blog/post/interfacing-with-julia/ ) for latex and Julia. :
Idd that's true, but I would also like to know your experiences with it (if any).
I have no experience but if you google `julia pgfplots` you get several hits such as [this one](https://juliapackages.com/p/pgfplots). I believe to vaguely remember having seen some questions on this in TeX.se.
I recently heard from one of my colleague someone made a nice interface between latex and julia so that julia can use latex to make plots. Does any one of have heard/used it in julia? PS: Julia is a programming language.
Yes. It is a matter of philosophy imho. I use the way to teach secondary school.
You can also write `\SI{0.5}{\kilo\metre\per\hour}` - which one to use is a matter of philosophy imho @Joseph I use `siunitx` package. Am I true when I type $\SI{ 0.5}{km/h} $?> many people now picked up bird watching as their hobby Very reasonable given that marmots are hibernating in their burrows. :smile_cat:
Amazing story! Thanks for sharing the link! It is so refreshing to read news about happy people. Nice that a little bird can bring so much joy to all these people. I recently listed to a podcast about life in Paris during the pandemic. During lockdown a lot of different birds have conquered (back) the city and the podcast said that many people now picked up bird watching as their hobby :)
@samcarter -- When I first signed up here, you asked what I had chosen for an avatar, and I identified it as a painted bunting. Well, here's a report of an actual sighting, much out of normal range, and the poor thing is all fluffed up on account of the cold: https://www.washingtonpost.com/dc-md-va/2021/01/03/painted-bunting-great-falls-bird-watchers/
https://i.imgur.com/CkwmJ0a.gif
https://tex.stackexchange.com/a/554290/213378
```
import animate;
settings.tex="pdflatex";
settings.outformat="pdf";
animation Ani;
import graph;
size(200);
pair[] P={(2,4),(0,0),(6.5,0.5),(1,-3.2)};
real t=0;
pair f(real t){return (1-t)^3*P[0]+3*(1-t)^2*t*P[1]+3*(1-t)*t^2*P[2]+t^3*P[3];}
for (int i=0; i<=20; ++i){
t=i/20;
save();
pair A=interp(P[0],P[1],t);
pair B=interp(P[1],P[2],t);
pair C=interp(P[2],P[3],t);
pair U=interp(A,B,t);
pair V=interp(B,C,t);
pair W=interp(U,V,t);
draw(P[0]--P[1]--P[2]--P[3],pink);
draw(A--B--C,( i != 0 ) ? green+0.7bp : invisible);
draw(U--V,( i != 0 ) ? blue+0.7bp : invisible);
draw(graph(f,0,t),red+1.3bp);
dot(P,magenta);
dot(A^^B^^C,( i != 0 ) ? green : invisible);
dot(U^^V,( i != 0 ) ? blue : invisible);
dot(W,pink);
Ani.add();
restore();
}
for (int i=20; i>=0; --i){
t=i/20;
save();
pair A=interp(P[0],P[1],t);
pair B=interp(P[1],P[2],t);
pair C=interp(P[2],P[3],t);
pair U=interp(A,B,t);
pair V=interp(B,C,t);
pair W=interp(U,V,t);
draw(P[0]--P[1]--P[2]--P[3],pink);
draw(A--B--C,( i != 0 ) ? green+0.7bp : invisible);
draw(U--V,( i != 0 ) ? blue+0.7bp : invisible);
draw(graph(f,0,t),red+1.3bp);
dot(P,magenta);
dot(A^^B^^C,( i != 0 ) ? green : invisible);
dot(U^^V,( i != 0 ) ? blue : invisible);
dot(W,pink);
Ani.add();
restore();
}
erase();
Ani.movie(BBox(3mm,Fill(black)));
```You're welcome! I think one can improve it by using a `standaloneframe`. (Interestingly it seems that an `xsavebox` eats the fadings.)
May I persuade you to edit https://topanswers.xyz/tex?q=1587 in particular the Asymptote and PSTricks parts?
Happy New Year! May I persuade you to edit https://topanswers.xyz/tex?q=1587 in particular the `l3draw` part?
... but it does show that the answer you got is a tiny bit off, and that it is possible. Now one would have to prettify things. (I think `makecell` does such things but I am not sure.)
This is not pretty but a proof of principle.
```
\documentclass[a4paper]{article}
\usepackage[margin=1.25in]{geometry}
\usepackage{float}
\usepackage{tabularx}
\renewcommand{\arraystretch}{1.5}
\usepackage{multirow}
\title{}
\author{}
\date{}
\begin{document}
\begin{table}[H]
\centering
\begin{tabular}{@{}lm{3cm}|}
\hline
\begin{tabularx}{\dimexpr\textwidth-3cm-2\arraycolsep}{|p{2cm}|X|}
\textbf{Participant} & \textbf{Answer}
\end{tabularx} & \textbf{Themes} \\
\hline\hline
\begin{tabularx}{\dimexpr\textwidth-3cm-2\arraycolsep}{|p{2cm}|X|}
Short text here & I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think I think \\
\hline
Short text here & test \\
\hline
Short text here & test \\
\hline
Short text here & test \\
\hline
Short text here & test \\
\end{tabularx} & something here \\
\hline
\end{tabular}
\end{table}
\end{document}
```
Yes, I did. But the given answer uses multirow{9.5} and says to count the number of lines to e.g. get 9.5. Is there no automatic way for that?With this question https://tex.stackexchange.com/questions/577144/use-multiple-rows-along-with-vertical-centering, is there no automatic solution?
With the Ti*k*Zling package. :smile_cat:
```
\documentclass[tikz,border=0mm]{standalone}
\usepackage{tikzlings}
\usetikzlibrary{fadings}
\newsavebox\Koala
\sbox{\Koala}{\begin{tikzpicture}
\koala
\end{tikzpicture}}
\begin{tikzfadingfrompicture}[name=2021]
\node [text=transparent!20] {\Large\bfseries2021};
\end{tikzfadingfrompicture}
\begin{document}
\def\myN{50}
\edef\iloop{0}
\loop
\pgfmathsetmacro{\dx}{(rnd-0.5)*4}%
\pgfmathsetmacro{\dy}{(rnd-0.5)*20}%
\ifnum\iloop=0
\edef\lstx{\dx}
\edef\lsty{\dy}
\else
\edef\lstx{\lstx,\dx}
\edef\lsty{\lsty,\dy}
\fi
\edef\iloop{\the\numexpr\iloop+1}%
\ifnum\iloop<\numexpr\myN+1\repeat
\foreach \myn in {0,...,\myN}
{\begin{tikzpicture}
\draw[red,fill=black](-1,-1.4) rectangle (1,1.4);
\foreach \X in {0,...,\myn}
{\pgfmathsetmacro{\dx}{{\lstx}[\X]}
\pgfmathsetmacro{\dy}{{\lsty}[\X]}
\shade[path fading=2021,fit fading=false,
fading transform={yshift=\dy mm,xshift=\dx mm}]
node{\usebox\Koala};}
\end{tikzpicture}}
\end{document}
````
There are certainly things that can be improved, e.g. employing beamer mechanisms. One cannot convert this directly to an annmated gif but needs `pdftoppm` to create bitmaps,
```
pdftoppm multi.pdf ppm_pic
```
and then e.g.
```
convert -density 300 -delay 64 -loop 0 -alpha remove ppm-pic*.ppm animated.gif
```
Happy new year ;)
Happy new year to all of you!
You should work on collecting your tikz legacy. It is sad to find that I can't get back to your answers on tex.sx easily. Anyway, that mentioned site is founded by a single person not an entity. So, I hope to find your contributions kept well somewhere. Cheers to your marmots 😊
No, `.com` sites are not that attractive to me. I am more a fan of `.org` sites, see e.g. [marmots.org](https://marmots.org). Maybe the folks at [marmot.com](https://www.marmot.com) are interested in contributing. :smile_cat:
@marmot have you considered contributing to this website? https://latexdraw.com/