%% 
%%  A DANTE-Edition example
%% 
%%  Example 27-02-1 on page 510.
%% 
%%  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{filecontents}
\begin{filecontents*}{data2T.csv}
1, 0.5, 2, 0.5
1, 2, 1.5, 1
\end{filecontents*}

\usepackage{pstricks,pst-bar}

\begin{document}
\begin{pspicture}(-0.5,-0.1)(4,4)
  \psgrid[xunit=4cm,gridlabels=0,
    subgriddiv=0,griddots=30](0,0)(1,4)
  \psaxes[axesstyle=frame,Ox=0,Dx=1,Dy=2,
    labels=y,ticks=y](0,0)(4,4)
  \readpsbardata[header=false]%
    {\data}{data2T.csv}%
  \psbarchart[barstyle={red,blue},
    chartstyle=stack]{\data}
\end{pspicture}
\end{document}