%% 
%%  A DANTE-Edition example
%% 
%%  Example 28-02-15 on page 530.
%% 
%%  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{pstricks}
\usepackage{pst-func}

\begin{document}
\psset{xunit=0.25,yunit=5}
\begin{pspicture}(-12,-.65)(12,1.1)
  \rput(13,0.8){$\displaystyle
    J_n(x)=\frac{1}{\pi}\int_0^\pi\cos(x\sin t-nt)\mathrm{d}t$}
  \psaxes[Dy=0.2,Dx=4]{->}(0,0)(-26,-.6)(26,1.05)
  \psset{linewidth=1pt}
  \psBessel[linecolor=red]{0}{-25}{25}
  \psBessel[linecolor=blue]{1}{-25}{25}
  \psBessel[linecolor=magenta]{3}{-25}{25}
\end{pspicture}
\end{document}