%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 05-01-9 auf Seite 67.
%% 
%%  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
%% 
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{169.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-plot}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-2.5,-2.5)(2.5,2.5)
\psparametricplot[variableLW,
  startLW=0.1pt,endLW=12pt,
  plotpoints=1000,linecap=2,
  linecolor=blue!40,
  algebraic]%
  {0}{20}{t/10*sin(t)|t/10*cos(t)}
\end{pspicture}
\end{document}
