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%% 
%%  Ein Beispiel der DANTE-Edition
%% 
%% 
%%  Copyright (C) 2010 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{190.324pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{pst-plot,multido}\SpecialCoor
\StopShownPreambleCommands
\begin{document}
\newcommand\drawseg[2]{%
  \pscustom[linecolor=red]{%
    \translate(#1,#2) \rotate{(#2,#1)}  % Vector in direction of field at x=#1,y=#2
  \psline(-.25,0)(.25,0)}}
\psscalebox{0.7}{%
\begin{pspicture}(-5,-5)(5.5,5.5)  \psset{arrows=->,arrowscale=1.5}
  \psaxes[linestyle=dashed,linewidth=0.1pt,arrowscale=3](0,0)(-5,-5)(5.5,5.5)
  \multido{\n=-5+1}{11}{\multido{\N=-5+1}{11}{%
    \ifnum\N=0\relax \ifnum\n=0\relax \else\drawseg{\n}{\N}\fi
      \else\drawseg{\n}{\N}\fi}}
\end{pspicture}}
\end{document}