%% 
%%  A DANTE-Edition example
%% 
%%  Example 05-03-6 on page 68.
%% 
%%  Copyright (C) 2011 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[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks}

\begin{document}
\begin{pspicture}[showgrid](4,3)
  \psecurve[showpoints=true,linecolor=red,
     linewidth=1.5pt]%
     (.125,5)(.25,3)(1,2.5)(1,1)(2,2)(4,0)(8,.125)
  \pscurve[linecolor=blue,
    linewidth=0.5pt,linestyle=dashed]%
      (0.25,3)(1,2.5)(1,1)(2,2)(4,0)
\end{pspicture}
\end{document}