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%% 
%%  A DANTE-Edition example
%% 
%%  Example 15-04-8 on page 217.
%% 
%%  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{153.70511pt}
\setlength\parindent{0pt}
\usepackage{pstricks,pst-plot}
\makeatletter
\pst@def{ScalePoints}<
  /y ED /x ED
  counttomark dup dup cvi eq not {exch pop} if
  /m exch def /n m 2 div cvi def
  n { y mul m 1 roll x mul m 1 roll
     /m m 2 sub def } repeat>
\makeatother

\usepackage{pst-plot} \psset{yunit=0.75cm}
\makeatletter
\def\plotValues#1{%
  \pscustom{\code{ /xOffset 5 def /yOffset -2 def
    /Times findfont 11 scalefont setfont
    /Feld [ #1 ] def /cnt 0 def
    Feld length 2 div cvi {
     /x Feld cnt get def /y Feld cnt 1 add get def
     x \pst@number\psxunit mul xOffset add
     y \pst@number\psyunit mul yOffset add
     moveto x 10 string cvs show
     /cnt cnt 2 add def } repeat }}}
\makeatother
\def\dataV{6.8 -1 5.9 -2 5.4 -3 5.7 -4 6.2 -5}

\begin{document}
\begin{pspicture}(3.5,0.5)(8,-5.5)
 \psaxes[Ox=4]{->}(4,0)(8,-5)
 \listplot[plotstyle=curve,showpoints]{\dataV}
 \plotValues{\dataV}
\end{pspicture}
\end{document}