r.surf.random.1grass man page

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

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

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

Author

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

Last changed: $Date: 2016-06-02 22:48:17 +0200 (Thu, 02 Jun 2016) $

Source Code

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

Info

GRASS 7.4.1 Grass User's Manual