Gri Commands

1: Introduction
2: Simple example
3: Fancy example
4: Running Gri
5: Programming Gri
6: General Issues
7: X-Y Plots
8: Contour Plots
9: Image Plots
10: Examples
11: Handling Data
12: Gri Commands
13: Gri Extras
14: Evolution of Gri
15: Installing Gri
16: Gri Bugs
17: System Tools
18: Acknowledgments
19: License
20: Newsgroup

21: Concept Index

12.6: The `create' Command

12.6.1: The `create columns from function' Command

`create columns from function'

Plot a function of x which is defined in synonym \function. 
ENVIRONMENT
\function = function to plot.
\xmin     = minimum x value
\xmax     = maximum x value
\xinc     = increment in x values
     
EXAMPLE
\function = "cos(x)"
\xmin     = "0"
\xmax     = "2 * 3.14"
\xinc     = "0.1"
create columns from function
draw curve
quit

NOTE: This only works on machines which have the `awk' command available at the commandline. This means most unix machines and some vax machines.

12.6.2: The `create image grayscale' ... Command

`create image grayscale banded .band.'

Make a banded grayscale with in units of .band. pixel values each. Thus, pixel values 0 to (.band. - 1) on the image will map to 0, while values from .band. to (2 * .band. - 1) will map to .band., etc. For example, .band. = 2 gives grayscale = (0 0 2 2 4 4 6 6 ... 252 252 254 254).