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r.stats.quantile(1grass) | Grass User's Manual | r.stats.quantile(1grass) |
NAME¶
r.stats.quantile - Compute category quantiles using two passes.KEYWORDS¶
raster, statistics, percentile, quantileSYNOPSIS¶
r.stats.quantiler.stats.quantile --help
r.stats.quantile [-rpt] base=name cover=name [quantiles=integer] [percentiles=float[,float,...]] [bins=integer] [output=name[,name,...]] [file=name] [separator=character] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:¶
- -r
-
Create reclass map with statistics as category labels - -p
-
Do not create output maps; just print statistics - -t
-
Print statistics in table format - --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:¶
- base=name [required]
-
Name of base raster map - cover=name [required]
-
Name of cover raster map - quantiles=integer
-
Number of quantiles - percentiles=float[,float,...]
-
List of percentiles
Default: 50 - bins=integer
-
Number of bins to use
Default: 1000 - output=name[,name,...]
-
Resultant raster map(s) - file=name
-
Name for output file (if omitted or "-" output to stdout) - separator=character
-
Field separator
Special characters: pipe, comma, space, tab, newline
Default: :
DESCRIPTION¶
r.stats.quantile is a tool to analyse exploratory statistics of a floating-point "cover layer" according to how it intersects with objects in a "base layer". It provides quantile calculations as selected "zonal statistics".NOTES¶
r.stats.quantile is intended to be a partial replacement for r.statistics, with support for floating-point cover maps. It provides quantile calculations, which are absent from r.stats.zonal.EXAMPLE¶
In this example, the raster polygon map zipcodes in the North Carolina sample dataset is used to calculate quantile raster statistics using the elevation raster map:g.region raster=zipcodes -p # print quantiles r.stats.quantile base=zipcodes cover=elevation quantiles=3 -p 27511:0:33.333333:134.717392 27511:1:66.666667:143.985723 27513:0:33.333333:140.669993 27513:1:66.666667:146.279449 27518:0:33.333333:115.140101 27518:1:66.666667:129.893723 [...] # write out percentile raster maps r.stats.quantile base=zipcodes cover=elevation percentiles=25,50,75 \ output=zipcodes_elev_q25,zipcodes_elev_q50,zipcodes_elev_q75
SEE ALSO¶
r.quantile, r.stats.zonal, r.statisticsAUTHOR¶
Glynn ClementsMarkus Metz
Last changed: $Date: 2017-05-07 22:27:56 +0200 (Sun, 07 May 2017) $
SOURCE CODE¶
Available at: r.stats.quantile source code (history)Main index | Raster index | Topics index | Keywords index | Graphical index | Full index
© 2003-2019 GRASS Development Team, GRASS GIS 7.6.0 Reference Manual
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