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Chapters: 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 Indices: Concepts Commands Variables | 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 `gri.sourceforge.net`. See also: The Gre language combines Gri features with Perl features.