Gri is a command-driven application for making x-y graphs, contour-graphs, and image graphs.

this is the gri manual in html format and can be accessed directly via
file:/usr/share/doc/gri/html/index.html
or
http://localhost/doc/gri/html/
or via doc-central, dwww or dhelp interfaces (if you have the doc-base package installed). note that the manual in info format (without graphics) is included in the gri package itself. this manual is available on the web via:
http://gri.sourceforge.net/gridoc/html/