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Asymptote is a vector graphics language. It is part of most linux distributions. (sudo apt-get install asymptote). It is motivated by MetaFont and Metapost. Here is how to use it from the command line: Assume we have a file square.asy which has the content ```size(3cm); draw(unitsquare); label(" ,(0,0),SW); label(" ,(1,0),SE); label(" ,(1,1),NE); label(" ,(0,1),NW); fill(shift(4,0)*rotate(30)*P, yellow); ```
then the following command
```asy square.asy
```
produces an EPS file, which can be included into a Latex document. Here is an other example on how to graph: ```size(10cm); import graph; real f(real x) { return x*sin(10*1/(0.001+x^2)); } draw(graph(f,-3,3,300),blue); ```
Here is a fancy example from the documentation: ```size(600); real a=5; real b=12; real c=hypot(a,b); transform ta=shift(c,c)*rotate(-aCos(a/c))*scale(a/c)*shift(-c); transform tb=shift(0,c)*rotate(aCos(b/c))*scale(b/c); picture Pythagorean(int n) { picture pic; fill(pic,scale(c)*unitsquare,1/(n+1)*red+n/(n+1)*green); if(n == 0) return pic; picture branch=Pythagorean(--n); add(pic,ta*branch); add(pic,tb*branch); return pic; } add(Pythagorean(12)); ```