<html> <head> <!-- This file has been generated by unroff 1.0, 03/11/09 12:56:13. --> <!-- Do not edit! --> <STYLE TYPE="text/css"> <!-- A:link{text-decoration:none} A:visited{text-decoration:none} A:active{text-decoration:none} OL,UL,P,BODY,TD,TR,TH,FORM { font-family: arial,helvetica,sans-serif;; font-size:small; color: #333333; } H1 { font-size: x-large; font-family: arial,helvetica,sans-serif; } H2 { font-size: large; font-family: arial,helvetica,sans-serif; } H3 { font-size: medium; font-family: arial,helvetica,sans-serif; } H4 { font-size: small; font-family: arial,helvetica,sans-serif; } --> </STYLE> <title>ploticus: controlling ploticus from other programs (automation)</title> <body bgcolor=D0D0EE vlink=0000FF> <br> <br> <center> <table cellpadding=2 bgcolor=FFFFFF width=550><tr> <td> <table cellpadding=2 width=550><tr> <td><br><h2>controlling ploticus from other programs (automation)</h2></td> <td align=right> <small> <a href="../doc/welcome.html"><img src="../doc/ploticus.gif" border=0></a><br> Version 2.41 Mar2009 <td></tr></table> </td></tr> <td> <br> <br> <title>Manual page for controlling_ploticus_from_other_programs_(automation)(PL)</title> </head> <body> <h2>DESCRIPTION</h2> Notes on executing ploticus under the control of another program in an automated way.<tt> </tt> <h2>STRATEGY</h2> <p> As of version 2.00, pl can be <a href="cgi.html"> directly invoked as a CGI program </a> <p> A <a href="../download/ploticus.perl"> perl script </a> which implements a web interface to ploticus was contributed by Tom McClure.<tt> </tt> <p> Since it is a command-line program, <b>ploticus</b> can easily be invoked by other programs automatically for unattended use.<tt> </tt> For instance, web server CGI scripts can invoke <b>pl</b> to build PNG or GIF data displays on demand. Or <b>pl</b> may be invoked by <b>cron</b> to produce plots on a regular basis.<tt> </tt> <p> The invoking program can build a ploticus script on the fly, or use one that has been created in advance.<tt> </tt> <p> The actual invocation can be done using the equivalent of <tt>system()</tt>. For example, in C: <dl> <dt><dd><p> <tt>system( "pl -gif myfile.p ITEM=hgxz" );</tt> </dl> <h2>VARIABLES</h2> Variables may be useful for implementation of changeable paramters (the invoking program would execute <b>pl</b> and set variables on the command line).<tt> </tt> For example: <p> <tt>pl -gif status.p STARTDATE=010198 ENDDATE=062699 GROUP=hgc</tt> <br> <br> </td></tr> <td align=right> <a href="../doc/welcome.html"> <img src="../doc/ploticus.gif" border=0></a><br><small>data display engine <br> <a href="../doc/Copyright.html">Copyright Steve Grubb</a> <br> <br> <center> <img src="../gallery/all.gif"> </center> </td></tr> </table> <br> <center> <table><tr><td> Ploticus is hosted at http://ploticus.sourceforge.net</td><td> </td><td> <a href="http://sourceforge.net/projects/ploticus"><img src="http://sflogo.sourceforge.net/sflogo.php?group_id=38453&type=12" width="120" height="30" border="0" alt="Get ploticus data display engine at SourceForge.net. Fast, secure and Free Open Source software downloads" /></a> </td></tr></table> </center> <p><hr> Markup created by <em>unroff</em> 1.0, <tt> </tt> <tt> </tt>March 11, 2009. </body> </html>