[metapost] drawing a beta-distribution?

[Martin Kaffanke]

Am Freitag, den 11.01.2008, 11:30 +0100 schrieb Ph. Ivaldi:

> I think Asymptote, the younger brother of Metapost, can do this job
> more
> simply:

That's great!

I could customize that for my needs except that I want to have the
numbers on the axis in my default latex font size?

Thanks,
Martin

> 8<------8<------8<------8<------8<------8<------8<------8<------8<------
> import graph;
> unitsize(10cm,3cm);
> 
> typedef real realfcn(real);
> 
> realfcn betaDistribution(real alpha, real beta){
>   return new real(real x){
>     return gamma(alpha+beta)/(gamma(alpha)+gamma(beta))*
>            x^(alpha-1)*(1-x)^(beta-1);
>   };
> };
> 
> real[][] ab=new real[][] {{0.5,0.5}, {5,1}, {1,3}, {2,2}, {2,5}};
> pen[] p=new pen[] {0.8*red, 0.8*green, 0.8*blue, 0.8*magenta, black};
> 
> for (int i=0; i < 5; ++i) {
>   draw(graph(betaDistribution(ab[i][0],ab[i][1]),1e-5,1-1e-5), bp+p[i],
>        legend="$\alpha="+(string)ab[i][0]+
>               ",\;\beta="+(string)ab[i][1]+"$");
> }
> 
> xlimits(0,1,Crop);
> ylimits(0,2.6,Crop);
> 
> xaxis("$x$",BottomTop,linewidth(bp),Ticks);
> yaxis("$y$",LeftRight,linewidth(bp),Ticks(Step=0.2));
> 
> attach(scale(0.75)*legend(linelength=3mm),point(N),5S);
> shipout(format="pdf");
> 8<------8<------8<------8<------8<------8<------8<------8<------8<------
> Result here: http://cjoint.com/?bllrlSAqM2
> 
-- 
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Martin Kaffanke +43 650 4514224
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