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  1. #!/usr2/local/bin/perl -w
  2.  
  3. $| = 1;
  4. print "Content-type: image/gif\n\n";
  5.  
  6. open GP, "| /usr/bin/gnuplot " .
  7.          "| /usr2/local/netpbm/bin/ppmtogif -interlace";
  8.  
  9. print GP <<GPH;
  10. set terminal pbm color   # select the ppm device driver
  11. set size 0.5,0.5         # render at half the normal size
  12. plot sin(x)              # a very simple gnuplot program
  13. GPH
  14.  
  15. close GP;
  16.  
  17. 1;
  18.  
  19.