.TH r.colors.stddev 1grass "" "GRASS 6.4.2" "Grass User's Manual"
.SH NAME
\fI\fBr.colors.stddev\fR\fR  - Set color rules based on stddev from a map's mean value.
.SH KEYWORDS
raster, color table
.SH SYNOPSIS
\fBr.colors.stddev\fR
.br
\fBr.colors.stddev help\fR
.br
\fBr.colors.stddev\fR [-\fBbz\fR] \fBinput\fR=\fIname\fR  [--\fBverbose\fR]  [--\fBquiet\fR] 
.SS Flags:
.IP "\fB-b\fR" 4m
.br
Color using standard deviation bands
.IP "\fB-z\fR" 4m
.br
Force center at zero
.IP "\fB--verbose\fR" 4m
.br
Verbose module output
.IP "\fB--quiet\fR" 4m
.br
Quiet module output
.PP
.SS Parameters:
.IP "\fBinput\fR=\fIname\fR" 4m
.br
Name of input raster map
.PP
.SH DESCRIPTION
\fIr.colors.stddev\fR 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.
.PP
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.
.PP
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.
.SH EXAMPLE
North Carolina sample dataset location:
\fC
.DS
.br
g.region rast=elevation -p
.br
r.colors.stddev elevation
.br
.DE
\fR
.SH SEE ALSO
\fI
r.colors,
r.univar,
v.colors
\fR
.SH AUTHOR
Hamish Bowman, \fIDunedin, New Zealand\fR
.PP
\fILast changed: $Date: 2011-09-04 15:23:30 +0200 (Sun, 04 Sep 2011) $\fR
.PP
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.PP
© 2003-2011 GRASS Development Team