Uncontinuous curves

[Eddie Saudrais]

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-----Message d'origine-----
De : Nicolas FRANCOIS <nicofran at club-internet.fr>
À : pstricks at tug.org <pstricks at tug.org>
Date : mardi 11 mai 1999 01:12
Objet : Uncontinuous curves


>Hi. I would like to draw scale functions with discontinuities, using lines
>with a half-circle at the end. How should I replace the >-< option to
>achieve this ?


Dear Nicolas,

You can use brackets {-)} and {(-} (it's not a smiley !). The problem is
that -( and )_ don't exist  :-(   (it's a smiley !).
Well, this is a possible trick :

\begin{tabular}{p{8cm}p{8cm}}
     \begin{pspicture}(8,5)
     \psline{->}(0.5,2.5)(7.5,2.5)
     \psline{->}(4,0.5)(4,4.5)
     \psline[linewidth=0.5mm](0.5,0.93)(3.9,0.93)
     \psline[rbracketlength=0.5]{(-}(3.9,0.93)(3.901,0.93)    %it's look
like a half-circle
     \psline[linewidth=0.5mm](4.1,4.07)(7.5,4.07)
     \psline[rbracketlength=0.5]{-)}(4.099,4.07)(4.1,4.07)
     \psdots[dotstyle=*,dotsize=4pt 2](4,2.5)
     \rput(3.7,4.07){$\frac{\pi}{2}$}
     \rput(4.3,0.93){$-\frac{\pi}{2}$}
     \end{pspicture}
    &
     \begin{pspicture}(8,5)
     \psline{->}(0.5,1)(7.5,1)
     \psline{->}(4,0.5)(4,4.5)
     \psline[linewidth=0.5mm](0.5,1)(1.9,1)
     \psline[rbracketlength=0.5]{(-}(1.9,1)(1.901,1)
     \psline[linewidth=0.5mm](6.1,1)(7.5,1)
     \psline[rbracketlength=0.5]{-)}(6.099,1)(6.1,1)
     \psline[linewidth=0.5mm](2.1,4.14)(5.9,4.14)
     \psline[rbracketlength=0.5]{-)}(2.099,4.14)(2.1,4.14)
     \psline[rbracketlength=0.5]{(-}(5.9,4.14)(5.901,4.14)
     \psdots[dotstyle=*,dotsize=4pt 2](2,2.5)(6,2.5)
     \rput(4.3,2.5){$\frac{\pi}{4}$}
     \rput(4.3,4.5){$\frac{\pi}{2}$}
     \end{pspicture}
   \end{tabular}

It's "quick and dirty", but you have not to drawn an arc at each end of the
curve...

Eddie

PS : you are french ?....

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