%% 
%%  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}
