GRI on Helix
Gri is a programming language for drawing science-style graphs. It is not mouse-driven, and it does not draw business-style graphs (e.g. pie charts, three-dimensional graphs). Gri has substantial power in advanced applications. It has been proven to be easy to learn; for simple applications, the learning curve is less than an hour. Many users regard Gri as the plotting equivalent of the LaTeX document preparation system.
GRI can be used interactively or non-interactively. Output is in Postscript format.
Using GRI
GRI commands can be typed interactively at the GRI prompt. However, most users will prefer to enter commands into a file. Sample GRI command file:
------- this file is example1.gri ---------------- # Example 1 -- Linegraph of data in separate file open example1.dat # Open the data file read columns x y # Read (x,y) columns draw curve # Draw data curve draw title "Example 1"# Title above plot
This set of GRI commands can be run by typing
gri example1.gri
Output from this run
Documentation
