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+%!TEX root = /Users/ego/Boulot/TKZ/tkz-fct/doc-fr/TKZdoc-fct-main.tex
+\section{Symboles}
+Certains ajoutent aux courbes des symboles afin de donner des indications supplémentaires au lecteur. Voici quelques exemples possibles~:
+
+\begin{tikzpicture}
+\draw[thick,(-)](0,0)--(2,2);
+\draw[thick,o-o](2,0)--(4,2);
+\draw[thick,)-(](4,0)--(6,2);
+\draw[thick,*-*](6,0)--(8,2);
+ \end{tikzpicture}
+
+\newcommand{\cred}[1]{{\color{red}#1}}
+\newcommand{\cgreen}[1]{{\color{green!50!black}#1}}
+\newcommand{\cblue}[1]{{\color{blue}#1}}
+
+L'exemple suivant est de \tkzname{Simon Schläpfer}~:
+
+On veut tracer
+\[
+y=\left\{\begin{array}{ll}
+ \cred{8-1.5x}&,\text{if }x<2\\
+ \cblue{4}&,\text{if }2 \leq x \leq 3\\
+ \cgreen{2x-4}&,\text{if } x>3
+ \end{array}
+\right.
+\]
+
+\begin{center}
+\begin{tkzexample}[vbox]
+\begin{tikzpicture}
+ \tkzInit[xmin=-1,xmax=6,ymin=0,ymax=10,xstep=1,ystep=1]
+ \tkzGrid[color=gray]
+ \tkzAxeXY
+ \tkzFct[{-[},color=red,domain =-1:2,samples=2]{8-1.5*\x}
+ \tkzFct[{[-]},color=blue,domain =2:3,samples=2]{4}
+ \tkzFct[{]-},color=green!50!black,domain =3:6,samples=2]{2*\x-4}
+\end{tikzpicture}
+\end{tkzexample}
+
+\end{center}
+
+
+\endinput