%%
%% A DANTE-Edition example
%%
%% Example 36-00-109 on page 815.
%%
%% 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}
\usepackage{pst-plot,multido}
\begin{document}
\begin{pspicture}(-1,-1)(5,5)
\psaxes[ticksize=0 -4pt]{->}(5,5)
\psparametricplot[algebraic,linewidth=1.5pt,linecolor=blue]{0}{5}{2*sqrt(t)|sin(t)+t}
\psparametricplot[algebraic,linewidth=1.5pt,linecolor=red]{0}{5}{2*sqrt(t)|cos(t)+t}
\multido{\rA=0.0+0.25}{20}{%
\psline{<->}(!2 \rA\space sqrt mul
\rA\space RadtoDeg sin \rA\space add)
(!2 \rA\space sqrt mul
\rA\space RadtoDeg cos \rA\space add)}
\end{pspicture}
\end{document}
