%% 
%%  Ein Beispiel der DANTE-Edition
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%%  7. Auflage
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%%  Beispiel 27-02-31 auf Seite 584.
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%%  Copyright (C) 2016 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{193.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-func} \psset{xunit=8cm,yunit=3cm}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture*}(-0.1,-0.2)(1.1,2.10)
 \multido{\rbeta=0.25+0.25,\iblack=0+5}{20}{%
   \psBetaDist[linewidth=1pt,beta=\rbeta,linecolor=black!\iblack]{0.01}{0.99}}
 \psaxes[Dy=0.2,Dx=0.1]{->}(0,0)(1,2.01)
\end{pspicture*}
\end{document}