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%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-1-40 on page 332.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  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.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-plot}
\StopShownPreambleCommands
\begin{document}
\psset{xunit=1.5cm,yunit=1.5cm}
\begin{pspicture}(-1.1,-1.1)(1.1,1.1)
  \psgrid[subgriddiv=0,griddots=10,
    gridlabels=7pt](-1,-1)(1,1)
  \parametricplot[plotstyle=curve,
    linewidth=1.5pt,plotpoints=200]{-360}{360}
    {t 1.5 mul sin t 2 mul 60 add sin}
\end{pspicture}
\end{document}