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%%
%% Ein Beispiel der DANTE-Edition
%%
%% 2. Auflage
%%
%% Beispiel 15-04-60 auf Seite 805.
%%
%% Copyright (C) 2016 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[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\usepackage[T1]{fontenc}
%StartShownPreambleCommands
\usepackage{pgfplots}
%StopShownPreambleCommands
\begin{document}
\begin{tikzpicture}[scale=0.75]
\begin{axis}[xlabel=Kosten,ylabel=Fehler]
\addplot[mark=x]coordinates{(2,-2.8)(3,-3.3)(4,-4)(5,-5.4)(6,-6)(7,-6.6)(8,-7.3) };
\end{axis}
\end{tikzpicture}
\begin{tikzpicture}[scale=0.75]
\begin{axis}[xlabel=$x$,ylabel={$f(x) = x^2 - x +4$}]
\addplot[color=red, line width=1.2pt]{x^2 - x +4};
\end{axis}
\end{tikzpicture}
\end{document}
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