%% Ein Beispiel der DANTE-Edition

%%
%% Ein Beispiel der DANTE-Edition
%%
%% 7. Auflage
%%
%% Beispiel 29-03-12 auf Seite 648.
%%
%% 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{217.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pstricks-add}
%StopShownPreambleCommands
\begin{document}
\psset{unit=5}
\begin{pspicture}(-0.04,-0.04)(1,1)
\psgrid[subgriddiv=5,
subgridcolor=lightgray]
\psplotDiffEqn[whichabs=0,
whichord=1,linecolor=red,
method=rk4,algebraic,
plotpoints=400,
showpoints=true]%
{0}{10}{0 0}%
{cos(Pi*x^2/2)|sin(Pi*x^2/2)}
\end{pspicture}
\end{document}