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+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% bsp05.tex ---
+%% Autor : Herbert Voss <voss@perce.de>
+%% Datum : 2004-04-25
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{filecontents}{dataError.dat}
+-0.7 -0.4 0.1 0.5 -0.43 3 0 0.4
+ 1 4.6 -0.5 0.2 1.2 2.3 -0.2 0.2
+ 1.7 3.9 -0.1 1 2.7 -1.1 -0.2 0.3
+ 3.98 -0.7 -0.4 0 4.5 0.7539 -0.5 0.4
+\end{filecontents}
+
+\documentclass{article}
+\usepackage{multido}
+\usepackage{pstricks}
+\usepackage{pst-plot}
+\SpecialCoor
+
+\makeatletter
+\def\errorLine{\@ifnextchar[{\pst@errorLine}{\pst@errorLine[]}}
+\def\pst@errorLine[#1](#2)#3#4{{%
+ \ifx#1\empty\else\psset{#1}\fi
+ \pst@getcoor{#2}\pst@tempa
+ \def\@errorMin{#3}
+ \def\@errorMax{#4}
+ \psline{|-|}(!%
+ /yDot \pst@tempa exch pop \pst@number\psyunit div def
+ /xDot \pst@tempa pop \pst@number\psxunit div def
+ xDot yDot \@errorMin\space add%
+ )(!%
+ /yDot \pst@tempa exch pop \pst@number\psyunit div def
+ /xDot \pst@tempa pop \pst@number\psxunit div def
+ xDot yDot \@errorMax\space add)
+}}
+%
+\def\GetCoordinates#1{\expandafter\GetCoordinates@i#1}
+\def\GetCoordinates@i #1{\GetCoordinates@ii#1}
+\def\GetCoordinates@ii#1 #2 #3 #4 #5 #6 #7 #8 {%
+ \DoCoordinate{#2}{#4}%
+ \errorLine[linecolor=red, linewidth=2pt](#2,#4){#6}{#8}% <<<<<
+ \@ifnextchar D{\GetCoordinates@ii}{}%
+}
+\makeatother
+
+\parindent=0pt
+\pagestyle{empty}
+\begin{document}
+
+\psset{dotscale=2,unit=1cm}%
+ \readdata{\Data}{dataError.dat}
+\begin{pspicture}(-1,-2)(5,5.5)
+ \psaxes(0,0)(-1,-2)(5,5)
+ \def\DoCoordinate#1#2{\psdot(#1,#2)}%
+ \GetCoordinates{\Data}
+\end{pspicture}
+
+\show\Data% f|r das Logfile
+
+\end{document}
+