March, 2007: Thomas Hartman is now offering an on-line gnuplot service here, at this link. Older news: This web site was compromised apparently due to a buffer overflow in gnuplot 3.7. While there are more recent patch-levels available, I feel that continuing to offer the public gnuplot testing interface is not advisable at this time, without giving the system a better-contained sandbox. If you would like to offer the service on your web site, I will be happy to provide you the wrapper scripts I had been using, and redirect users from this site to yours: Please e-mail me, with "GNUPLOT SCRIPTS" in the subject. davidnicol@davidnicol.com january 16, 2003