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-\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