<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div class="" style="word-wrap:break-word; line-break:after-white-space">Attached are two sample sourcecode files and the pdf output from one of them.
<div class="">The file PPFig.tex uses the pst-ode package to plot the integral curves of a homoeneous linear o.d.e., using a grid of initial values, indexed by \rx and \ry</div>
<div class="">and generated via a pair of nested multido commands.  The output is in PPFig.pdf (I generated it using Ghostscript).</div>
<div class="">In the file PPFigtest.tex, I am trying to generate the analogous picture, but with initial conditions going around the boundary of the box.</div>
<div class="">I foresee doing this separately for each edge;  what is there at the moment is the modified code for initial conditions along the bottom edge.</div>
<div class="">My modification of PPFig was to eliminate one level of the nested multi do.  It crashes and I can’t find where I messed up.</div>
<div class="">I’d be grateful if someone has a pair of eyes sharp enough to find my typo or syntax error.</div>
<div class="">
<div class=""></div>
</div>
</div>
<div style="word-wrap:break-word; line-break:after-white-space">
<meta content="text/html; charset=us-ascii">
<div>
<div></div>
</div>
</div>
<div style="word-wrap:break-word; line-break:after-white-space">
<meta content="text/html; charset=us-ascii">
<div>
<div></div>
</div>
</div>
<div class="" style="word-wrap:break-word; line-break:after-white-space">
<div class="">
<div class=""></div>
<div class=""><br class="">
</div>
<div class=""> <br class="">
<div class=""><span class="x_Apple-style-span" style="border-collapse:separate; font-variant-ligatures:normal; font-variant-east-asian:normal; line-height:normal; border-spacing:0px"><span class="x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px">
<div class="" style="word-wrap:break-word"><span class="x_Apple-style-span" style="border-collapse:separate; color:rgb(0,0,0); font-family:Helvetica; font-style:normal; font-variant:normal; font-weight:normal; letter-spacing:normal; line-height:normal; orphans:2; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px">
<div class="" style="word-wrap:break-word">
<div class="">
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font-size:12px">
<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica"><br class="x_Apple-interchange-newline">
Zbigniew Nitecki</font></div>
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font-size:12px">
<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">Department of Mathematics</font></div>
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font-size:12px">
<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">Tufts University</font></div>
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font-size:12px">
<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">Medford, MA 02155</font></div>
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font:normal normal normal 12px/normal Helvetica; min-height:14px; font-size:12px">
<br class="">
</div>
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font-size:12px">
<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">telephones:</font></div>
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font-size:12px">
<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">Office<span class="x_Apple-converted-tab">    </span>(617)627-3843</font></div>
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font-size:12px">
<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">Dept.<span class="x_Apple-converted-tab">    </span>(617)627-3234</font></div>
<div class="" style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; font-size:12px">
<font face="Helvetica" size="3" class="" style="font:normal normal normal 12px/normal Helvetica">Dept. fax<span class="x_Apple-converted-tab">    </span>(617)627-3966</font></div>
<span class="x_Apple-style-span" style="font-size:12px"><a href="http://www.tufts.edu/~znitecki/" class="">http://www.tufts.edu/~znitecki/</a></span></div>
</div>
</span><br class="x_Apple-interchange-newline">
</div>
</span><br class="x_Apple-interchange-newline">
</span><br class="x_Apple-interchange-newline">
</div>
<br class="">
</div>
</div>
</div>
</body>
</html>