PLOTMTV is a multipurpose X11 plotting program. PLOTMTV's
capabilities include 2D line and scatter plots (x-vs-y), contour plots, 3D
surface, line and scatter plots as well as vector plots. The program has a
rough but functional Graphical User Interface, through which it is possible
to zoom in, zoom out, pan, toggle between 2D and 3D plots, and rotate 3D
plots. Both color and grayscale postscript output are supported.

Printable documentation is in the /usr/share/doc/plotmtv-1.4.1 directory. If
you have relocated the package the docs will be in the appropriate
directory. The documentation covers the use of plotmtv and the data file
format.