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%%
%% A DANTE-Edition example
%%
%% Example 15-01-33 on page 175.
%%
%% 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}
\makeatletter
\newcount\pst@cntm\newcount\pst@cntn\newcount\pst@cnto
\def\pst@mod#1#2#3{%
\begingroup%
\pst@cntm=#1\pst@cntn=#2\relax \pst@cnto=\pst@cntm
\divide\pst@cntm by \pst@cntn \multiply\pst@cntn by \pst@cntm
\advance\pst@cnto by -\pst@cntn
\edef\value{\endgroup\def\noexpand#3{\number\pst@cnto}}\value}
\makeatother
\usepackage{pstricks,pst-plot}
\makeatletter
\def\pst@@@hlabel#1{\small%
\pst@mod{#1}{2}\tempa% 0 or 1
\ifnum1>\tempa% odd value?
\count1=#1\divide\count1 by 2% #1/2
$\the\count1\pi$% n*pi
\else$\frac{#1}{2}\pi$\fi}% n/2*pi
\makeatother
\begin{document}
\begin{pspicture}(-0.5,-1.25)(10,1.25)
\psaxes[xunit=1.570796,showorigin=false]{->}(0,0)(-0.5,-1.25)(6.4,1.25)
\psplot[linecolor=red,linewidth=1.5pt]{0}{9.4247}{x RadtoDeg sin}
\end{pspicture}
\end{document}
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