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  1: Introduction
  2: Simple example
  3: Invocation
  4: Finer Control
  5: X-Y Plots
  6: Contour Plots
  7: Image Plots
  8: Examples
  9: Gri Commands
  10: Programming
  11: Environment
  12: Emacs Mode
  13: History
  14: Installation
  15: Gri Bugs
  16: Test Suite
  17: Gri in Press
  18: Acknowledgments
  19: License

Introduction Introduction Gri Logo Gri is an extensible plotting language for producing scientific graphs, such as x-y plots, contour plots, and image plots.

This document describes Gri 2.12.26,
(c) 1991-2008 Dan Kelley.

New users: To see if Gri might be useful to you, spend a few minutes reading the introduction, the simple example tutorial, the FAQ and the cookbook. It is also a good idea to check out the real-world examples. Then you should return here to scan the table of contents.

Experienced users: To check the syntax of a command, consult the list of Gri commands. See the history to learn how Gri has changed over time.

Open-Source Development: Gri is distributed under an OpenSource licence (GPL). To monitor (or contribute to) the development process, visit

See also: The Gre language combines Gri features with Perl features.

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