r.stats.quantile(1grass)

1r.stats.quantile(1)           Grass User's Manual          r.stats.quantile(1)
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NAME

6       r.stats.quantile  - Compute category quantiles using two passes.
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KEYWORDS

9       raster, statistics, percentile, quantile
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SYNOPSIS

12       r.stats.quantile
13       r.stats.quantile --help
14       r.stats.quantile   [-rpt]   base=name  cover=name   [quantiles=integer]
15       [percentiles=float[,float,...]]          [bins=integer]           [out‐
16       put=name[,name,...]]    [file=name]    [separator=character]   [--over‐
17       write]  [--help]  [--verbose]  [--quiet]  [--ui]
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19   Flags:
20       -r
21           Create reclass map with statistics as category labels
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23       -p
24           Do not create output maps; just print statistics
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26       -t
27           Print statistics in table format
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29       --overwrite
30           Allow output files to overwrite existing files
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32       --help
33           Print usage summary
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35       --verbose
36           Verbose module output
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38       --quiet
39           Quiet module output
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41       --ui
42           Force launching GUI dialog
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44   Parameters:
45       base=name [required]
46           Name of base raster map
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48       cover=name [required]
49           Name of cover raster map
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51       quantiles=integer
52           Number of quantiles
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54       percentiles=float[,float,...]
55           List of percentiles
56           Default: 50
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58       bins=integer
59           Number of bins to use
60           Default: 1000
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62       output=name[,name,...]
63           Resultant raster map(s)
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65       file=name
66           Name for output file (if omitted or "-" output to stdout)
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68       separator=character
69           Field separator
70           Special characters: pipe, comma, space, tab, newline
71           Default: :
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DESCRIPTION

74       r.stats.quantile is a tool  to  analyse  exploratory  statistics  of  a
75       floating-point  "cover  layer"  according  to  how  it  intersects with
76       objects in  a  "base  layer".  It  provides  quantile  calculations  as
77       selected "zonal statistics".
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NOTES

80       r.stats.quantile  is intended to be a partial replacement for r.statis‐
81       tics, with support for floating-point cover maps. It provides  quantile
82       calculations, which are absent from r.stats.zonal.
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EXAMPLE

85       In  this example, the raster polygon map zipcodes in the North Carolina
86       sample dataset is used to calculate quantile  raster  statistics  using
87       the elevation raster map:
88       g.region raster=zipcodes -p
89       # print quantiles
90       r.stats.quantile base=zipcodes cover=elevation quantiles=3 -p
91       27511:0:33.333333:134.717392
92       27511:1:66.666667:143.985723
93       27513:0:33.333333:140.669993
94       27513:1:66.666667:146.279449
95       27518:0:33.333333:115.140101
96       27518:1:66.666667:129.893723
97       [...]
98       # write out percentile raster maps
99       r.stats.quantile base=zipcodes cover=elevation percentiles=25,50,75 \
100         output=zipcodes_elev_q25,zipcodes_elev_q50,zipcodes_elev_q75
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AUTHOR

106       Glynn Clements
107       Markus Metz
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109       Last changed: $Date: 2017-05-07 22:27:56 +0200 (Sun, 07 May 2017) $
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SOURCE CODE

112       Available at: r.stats.quantile source code (history)
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114       Main  index  | Raster index | Topics index | Keywords index | Graphical
115       index | Full index
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117       © 2003-2019 GRASS Development Team, GRASS GIS 7.4.4 Reference Manual
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121GRASS 7.4.4                                                r.stats.quantile(1)