1r.surf.random(1) Grass User's Manual r.surf.random(1)
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6 r.surf.random - Produces a raster surface map of uniform random devi‐
7 ates with defined range.
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10 raster, surface, random
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13 r.surf.random
14 r.surf.random --help
15 r.surf.random [-i] output=name [min=integer] [max=integer]
16 [--overwrite] [--help] [--verbose] [--quiet] [--ui]
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18 Flags:
19 -i
20 Create an integer raster map
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22 --overwrite
23 Allow output files to overwrite existing files
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25 --help
26 Print usage summary
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28 --verbose
29 Verbose module output
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31 --quiet
32 Quiet module output
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34 --ui
35 Force launching GUI dialog
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37 Parameters:
38 output=name [required]
39 Name for output raster map
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41 min=integer
42 Minimum random value
43 Default: 0
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45 max=integer
46 Maximum random value
47 Default: 100
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50 r.surf.random produces a raster map layer of uniform random deviates
51 whose range can be expressed by the user. It is essentially the same as
52 r.surf.gauss, but uses a linear random number generator instead. It
53 uses the random number generator drand48() or rand(), depending on the
54 user’s platform.
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56 Histogram of map generated with r.surf.random
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59 g.region -p n=228500 s=215000 w=630000 e=645000 res=10
60 r.surf.random out=random min=0 max=100
61 # check result
62 r.univar random
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65 r.random.surface, r.surf.contour, r.surf.fractal, r.surf.gauss,
66 r.surf.idw, v.surf.rst
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69 Jo Wood
70 Midlands Regional Research Laboratory (ASSIST)
71 University of Leicester
72 October 1991
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75 Available at: r.surf.random source code (history)
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77 Main index | Raster index | Topics index | Keywords index | Graphical
78 index | Full index
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80 © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual
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84GRASS 7.8.2 r.surf.random(1)