NAME¶
d.correlate - Prints a graph of the correlation between data
layers (in pairs).
KEYWORDS¶
display, diagram
SYNOPSIS¶
d.correlate
d.correlate help
d.correlate layer1=
string layer2=
string
[
layer3=
string] [
layer4=
string]
[--
verbose] [--
quiet]
Parameters:¶
- layer1=string
-
raster input map
- layer2=string
-
raster input map
- layer3=string
-
raster input map
- layer4=string
-
raster input map
DESCRIPTION¶
d.correlate is a shell (sh(1)) script that graphically displays the
results of an
r.stats run on two raster map layers. This shell script
is useful for highlighting the correlation (or lack of it) among data layers
(scattergram).
The results are displayed in the active display frame on the user's graphics
monitor.
d.correlate erases the active frame before displaying results.
OPTIONS¶
Parameters:¶
- layer1 layer2 [layer3 [layer4]]
-
The names of from two to four existing raster map layers to be included in
the correlation.
NOTES¶
This is a shell script that uses
r.stats and the UNIX
awk command
to calculate the correlation among data layers, and uses
d.text and
d.graph to display the results.
If three or four map layers are specified, the correlation among each
combination of two data layers is displayed.
FILES¶
This program is simply a shell script. Users are encouraged to make their own
shell script programs using similar techniques. See
$GISBASE/scripts/d.correlate.
SEE ALSO¶
The UNIX
awk command.
d.text, d.graph, r.coin, r.regression.line,
r.stats
AUTHOR¶
Michael Shapiro, U.S.Army Construction Engineering Research Laboratory
Rewritten to GRASS 6 (from csh to sh) by Markus Neteler
Last changed: $Date: 2011-11-08 12:29:50 +0100 (Tue, 08 Nov 2011) $
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© 2003-2011 GRASS Development Team