NAME
dcorrelate.sh - Graphically displays the
correlation among from two to four raster map layers in the
active frame on the graphics monitor.
(GRASS Shell Script)
SYNOPSIS
dcorrelate.sh layer1 layer2
[layer3 [layer4]]
DESCRIPTION
dcorrelate.sh is a C-shell (csh(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.
The results are displayed in the active display frame on
the user's graphics monitor. dcorrelate.sh 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.
This command is written for /bin/csh. If your system
doesn't support this shell, don't install this script.
FILES
This program is simply a shell script. Users are
encouraged to make their own shell script programs using
similar techniques. See $GISBASE/scripts/dcorrelate.sh.
SEE ALSO
The UNIX awk command
d.text,
d.graph,
r.coin,
r.stats
AUTHOR
Michael Shapiro,
U.S.Army Construction Engineering
Research Laboratory
Last changed: $Date$