A language for scientific illustration Gri is a language for scientific graphics programming. It is analogous to latex, and shares the property that extensive power is the reward for tolerating a modest learning curve. Gri output is in industry-standard PostScript, suitable for incorporation in documents prepared by various text processors.
Precise control is extended to all aspects of drawing, including line-widths, colors, and fonts.
Text includes a subset of the tex language, so that it is easy to incorporate Greek letters and mathematical symbols in labels. The following is a terse yet working Gri program. Upgrade to version number 2.6.1. Same for manpages. Someday I'll switch to using macros, but it means changing both this spec-file and various Makefiles, and I need to be sure that changes to the Makefiles don't hurt the distributions for Debian linux, for solaris, etc.