%% 
%%  A DANTE-Edition example
%% 
%%  Example 36-00-25 on page 778.
%% 
%%  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{375.57637pt}
\setlength\parindent{0pt}

\usepackage{pstricks}

\begin{document}
\newcount\WL
\def\WaveToPS#1%
 {\definecolor{tmp}{wave}{#1}%
  \extractcolorspec{tmp}\tmp
  \expandafter\convertcolorspec\tmp{rgb}\tmp
  \expandafter\WaveToPSi\tmp,}
\def\WaveToPSi#1,#2,#3,%
 {\pstVerb{/Red{#1}def /Green{#2}def /Blue{#3}def}}

\definecolor[ps]{lambda}{rgb}{Red Corr Green Corr Blue Corr}%
\pstVerb{/Corr{dup 0 gt {Gamma exp}if }def}

\def\DisplayBar#1#2%
 {\linethickness{1.25\unitlength}\WL=360
  \pstVerb{/Gamma{#1}def}%
  \multiput(360,#2)(1,0){456}%
   {\WaveToPS{\the\WL}%
    {\color{lambda}\line(0,1){50}}\global\advance\WL1}%
  \linethickness{0.25\unitlength}\WL=360
  \multiput(360,#2)(20,0){23}%
   {\picture(0,0)
    \line(0,-1){5}
    \multiput(5,0)(5,0){3}{\line(0,-1){2.5}}
    \put(0,-10){\makebox(0,0){\the\WL}}\global\advance\WL20
    \endpicture}%
  \put(350,#2){\makebox(0,50)[r]{\small$\gamma$\,=\,#1}}}

\unitlength.75pt
\begin{picture}(510,345)(310,-10)
\sffamily\tiny
\DisplayBar{0.4}{0}%
\DisplayBar{0.6}{70}%
\DisplayBar{0.8}{140}%
\DisplayBar{1.0}{210}%
\DisplayBar{1.2}{280}%
\end{picture}
\end{document}
