GRASS GIS manual: r.surf.random

Note: A new GRASS GIS stable version has been released: GRASS GIS 7.8, available here.
Updated manual page: here

NAME

r.surf.random - Produces a raster surface map of uniform random deviates with defined range.

KEYWORDS

raster, surface, random

SYNOPSIS

r.surf.random

r.surf.random --help

r.surf.random [-i] output=name [min=integer] [max=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

-i: Create an integer raster map
--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

output=name [required]: Name for output raster map
min=integer: Minimum random value; Default: 0
max=integer: Maximum random value; Default: 100

DESCRIPTION
EXAMPLE
SEE ALSO
AUTHOR

DESCRIPTION

r.surf.random produces a raster map layer of uniform random deviates whose range can be expressed by the user. It is essentially the same as r.surf.gauss, but uses a linear random number generator instead. It uses the random number generator drand48() or rand(), depending on the user's platform.

Histogram of map generated with r.surf.random

EXAMPLE

g.region -p n=228500 s=215000 w=630000 e=645000 res=10
r.surf.random out=random min=0 max=100

# check result
r.univar random

AUTHOR

Jo Wood
Midlands Regional Research Laboratory (ASSIST)
University of Leicester
October 1991

Last changed: $Date$

SOURCE CODE

Available at: r.surf.random source code (history)