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<TITLE>ifelse in \psplot</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Hi,</FONT>
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<P><FONT SIZE=2 FACE="Arial">please have a look at the following PSTricks-code (one</FONT>
<BR><FONT SIZE=2 FACE="Arial">of my first efforts using postscript).</FONT>
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<P><FONT SIZE=2 FACE="Arial">\documentclass{scrartcl}</FONT>
<BR><FONT SIZE=2 FACE="Arial">\usepackage{pstricks}</FONT>
<BR><FONT SIZE=2 FACE="Arial">\usepackage{pst-plot}</FONT>
<BR><FONT SIZE=2 FACE="Arial">\begin{document}</FONT>
<BR><FONT SIZE=2 FACE="Arial">\psset{unit=1mm}</FONT>
<BR><FONT SIZE=2 FACE="Arial">\begin{pspicture}(0,-18)(24,18)</FONT>
<BR><FONT SIZE=2 FACE="Arial"> \psline(0,0)(24,0)</FONT>
<BR><FONT SIZE=2 FACE="Arial"> \psplot{0}{24}{%</FONT>
<BR><FONT SIZE=2 FACE="Arial"> x 15 mul sin 3 mul</FONT>
<BR><FONT SIZE=2 FACE="Arial"> x 15 mul 3 mul sin</FONT>
<BR><FONT SIZE=2 FACE="Arial"> sub</FONT>
<BR><FONT SIZE=2 FACE="Arial"> 4.5 mul</FONT>
<BR><FONT SIZE=2 FACE="Arial"> }</FONT>
<BR><FONT SIZE=2 FACE="Arial">\end{pspicture}</FONT>
<BR><FONT SIZE=2 FACE="Arial">\end{document}</FONT>
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<P><FONT SIZE=2 FACE="Arial">What I'd like to have (but cannot achieveso far) is to eliminate</FONT>
<BR><FONT SIZE=2 FACE="Arial">the negative branch of the graph by using the ifelse-command</FONT>
<BR><FONT SIZE=2 FACE="Arial">from postscript. Is it at all allowed in \psplot? Or do I have</FONT>
<BR><FONT SIZE=2 FACE="Arial">to use \pstVerb? And if so, how?</FONT>
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<P><FONT SIZE=2 FACE="Arial">TIA,</FONT>
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<P><FONT SIZE=2 FACE="Arial">Jürgen</FONT>
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