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=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)

       Accessed: Friday Apr 04 01:19:40 2025

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       © 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

GRASS 8.4.1                                                                                r.surf.random(1grass)