%% 
%%  Ein Beispiel der DANTE-Edition
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%%  7. Auflage
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%%  Beispiel 14-04-2 auf Seite 231.
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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-plot}
%StopShownPreambleCommands
\begin{document}
\psset{yunit=0.7,labelFontSize=\scriptstyle}
\begin{pspicture}(0,-3.25)(10,3.5)
  \psaxes{->}(0,0)(0,-3)(10,3.5)\psset{algebraic,plotpoints=501}
  \psplot[linecolor=cyan, linewidth=3\pslinewidth]{0.01}{10}{ln(x)}%
  \psplot[linecolor=yellow,linewidth=3\pslinewidth]{0}{10}{3*cos(x)*2.71^(-x/10)}
  \psplot[linecolor=blue,showpoints,plotpoints=51]{0}{10}%
    {3*cos(x)*2.71^(-x/10)}
\end{pspicture}
\end{document}