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r.quantile.1grass

Langue: en

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Version: 332652 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

NAME

r.quantile - Compute quantiles using two passes.

KEYWORDS

raster, statistics

SYNOPSIS

r.quantile
r.quantile help
r.quantile [-r] input=name [quantiles=integer] [percentiles=float[,float,...]] [bins=integer] [--verbose] [--quiet]

Flags:

-r

Generate recode rules based on quantile-defined intervals.
--verbose

Verbose module output
--quiet

Quiet module output

Parameters:

input=name

Name of input raster map
quantiles=integer

Number of quantiles
Default: 4
percentiles=float[,float,...]

List of percentiles
bins=integer

Number of bins to use
Default: 1000000

DESCRIPTION

r.quantile computes quantiles in a manner suitable for use with large amounts of data. It is using two passes.

EXAMPLE

Calculation of elevation quantiles:
g.region rast=elevation.dem -p
r.quantile input=elevation.dem percentiles=0.1,1,10,25,50,75,90,99,99.9

SEE ALSO

r.quant

AUTHOR

Glynn Clements

Last changed: $Date: 2007-04-06 21:49:26 +0200 (Fri, 06 Apr 2007) $

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