r.surf.random.1grass - Man Page
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=float] [max=float] [seed=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=float
Minimum random value
Default: 0- max=float
Maximum random value
Default: 100- seed=integer
Seed for random number generator
The same seed can be used to obtain same results or random seed can be generated by other means.
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.
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
Figure: Random surface example (min: 10; max: 100)
With the histogram tool the cell values versus count can be shown.
Figure: Histogram of random surface example (min: 10; max: 100)
See Also
r.random.surface, 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
Source Code
Available at: r.surf.random source code (history)
Latest change: Friday Apr 05 16:24:05 2024 in commit: e59203466773b61eda9e18a9a9f923f824e635ba
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