%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
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%%  Beispiel 14-03-22 auf Seite 224.
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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{plotpoints=200,unit=0.3,labelFontSize=\scriptstyle}
\begin{pspicture}(-8.5,-8.5)(9,9)
  \psaxes[Dx=2,dx=2,Dy=2,dy=2,labelsep=.75mm,
    arrowlength=1.75,ticksize=2pt,linewidth=0.17mm]%
      {->}(0,0)(-8.5,-8.5)(9,9)[$x$,0][$y$,90]
  \psset{linewidth=.35mm,plotstyle=curve,polarplot}
  \psplot[linecolor=blue,algebraic]{0}{TwoPi 2 mul}{8*sin(2.5*x)}
\end{pspicture}
\end{document}