1r3.univar(1) Grass User's Manual r3.univar(1)
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6 r3.univar - Calculates univariate statistics from the non-null 3d
7 cells of a raster3d map.
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10 raster3d, statistics
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13 r3.univar
14 r3.univar help
15 r3.univar [-ge] input=name [percentile=integer] [--verbose]
16 [--quiet]
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18 Flags:
19 -g
20 Print the stats in shell script style
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22 -e
23 Calculate extended statistics
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25 --verbose
26 Verbose module output
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28 --quiet
29 Quiet module output
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31 Parameters:
32 input=name
33 Name of input raster3d map
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35 percentile=integer
36 Percentile to calculate (requires extended statistics flag)
37 Options: 0-100
38 Default: 90
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41 r3.univar calculates the univariate statistics for raster3d maps. This
42 includes the number of cells counted, minimum and maximum cell values,
43 range, arithmetic mean, population variance, standard deviation, and
44 coefficient of variation. If the -e extended statistics flag is given
45 the 1st quartile, median, 3rd quartile, and given percentile are calcu‐
46 lated. If the -g flag is given the results are presented in a format
47 suitable for use in a shell script.
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50 As with most GRASS raster3d modules, r3.univar operates on the cell
51 array defined by the current 3d region settings, not the original
52 extent and resolution of the input map. See g.region.
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54 This module can use large amounts of system memory when the -e extended
55 statistics flag is used with a very large region setting. If the region
56 is too large the module should exit gracefully with a memory allocation
57 error. Basic statistics can be calculated using any size input region.
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60 mode, skewness, kurtosis
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63 g.region
64 r.univar
65 r.univar.sh
66 r.average
67 r.median
68 r.mode
69 r.sum
70 r.series
71 r.stats
72 r.statistics
73 v.univar
74 v.univar.sh
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78 Soeren Gebbert
79 Code is based on r.univar from
80 Hamish Bowman, Otago University, New Zealand
81 and Martin Landa
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83 Last changed: $Date: 2007-04-06 21:49:26 +0200 (Fri, 06 Apr 2007) $
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85 Full index
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87 © 2003-2008 GRASS Development Team
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91GRASS 6.3.0 r3.univar(1)