r.surf.random.1grass man page

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

r.surf.random produces a raster map layer of uniform random deviates whose range can be expressed by the user. It is essentialy 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

See Also

r.surf.contour, r.surf.fractal, r.surf.gauss, r.surf.idw, v.surf.rst

Author

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

Last changed: $Date: 2014-12-27 23:51:00 +0100 (Sat, 27 Dec 2014) $

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GRASS 7.0.4 Grass User's Manual