NAME

       r.colors.stddev  - Set color rules based on stddev from a map's mean value.

KEYWORDS

       raster, color table

SYNOPSIS

       r.colors.stddev
       r.colors.stddev help
       r.colors.stddev [-bz] input=name  [--verbose]  [--quiet]

   Flags:
       -b
           Color using standard deviation bands

       -z
           Force center at zero

       --verbose
           Verbose module output

       --quiet
           Quiet module output

   Parameters:
       input=name
           Name of input raster map

DESCRIPTION

       r.colors.stddev  set  raster map color rules based on standard deviations from a map's mean value, either
       as a continuous color gradient or in color bands per standard deviation (S.D.) from the mean.

       With the color band option values less that 1 S.D. from the mean are colored green, within 1-2  S.D.  are
       colored yellow, within 2-3 S.D. are colored red, and beyond 3 S.D. are colored black.

       For  a differences map there is an option to lock the center of the color table at zero. Values more than
       two S.D. below the mean will be colored blue; values below the mean  but  less  than  2  S.D.  away  will
       transition to white, and above the mean the colors will simularly transition to full red at +2 S.D.

EXAMPLE

       North Carolina sample dataset location:
       g.region rast=elevation -p
       r.colors.stddev elevation

SEE ALSO

        r.colors, r.univar, v.colors

AUTHOR

       Hamish Bowman, Dunedin, New Zealand

       Last changed: $Date: 2011-09-04 06:23:30 -0700 (Sun, 04 Sep 2011) $

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       © 2003-2013 GRASS Development Team