%%
%%  Ein Beispiel der DANTE-Edition
%%
%%  7. Auflage
%%
%%  Beispiel 14-03-11 auf Seite 218.
%%
%%  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}
\begin{pspicture}(-2.5,-.5)(2.5,5.5)
 \psaxes{->}(0,0)(-2,0)(2,5.5)
 \psplot{-2}{2}{x dup mul }
 \psplot[plotstyle=xvalues*,
   plotpoints=10]{-2}{2}{x dup mul }
\end{pspicture}
\end{document}