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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}