We suggest that you download and make use of the fine plotting package Gnuplot [Williams and KelleyWilliams and Kelley1993]. which we use as the graphics engine to display the results of analyses. Gnuplot is freely available for UNIX, Macintosh and MS-Windows machines. It is quite easy to use, produces nice results and all the input files are plain text. We reprint the copyright information for Gnuplot verbatim:
GNUPLOT copyright information: Copyright (C) 1986 - 1993 Thomas Williams, Colin Kelley Permission to use, copy, and distribute this software and its documentation for any purpose with or without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. Permission to modify the software is granted, but not the right to distribute the modified code. Modifications are to be distributed as patches to released version. This software is provided "as is" without express or implied warranty. AUTHORS Original Software: Thomas Williams, Colin Kelley. Gnuplot 2.0 additions: Russell Lang, Dave Kotz, John Campbell. Gnuplot 3.0 additions: Gershon Elber and many others. For more information on GNUPLOT, see the documentation that comes with the program.