|
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 |
9.3.5: The `
|
`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
|
NOTE: This only works on machines which have the `awk' command
available at the commandline. This means most unix machines and some
vax machines.
create image grayscale'
`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).
