NAME

       d.correlate  - Prints a graph of the correlation between raster maps (in pairs).

KEYWORDS

       display, statistics, raster, diagram, correlation

SYNOPSIS

       d.correlate
       d.correlate --help
       d.correlate map=name[,name,...]  [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       map=name[,name,...] [required]
           Name of raster map(s)

DESCRIPTION

       d.correlate  displays  graphically the results of a r.stats analysis run on two raster map
       layers. This module  highlights  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. If no graphics  monitor  is
       open, a file map.png is generated in the current directory.

NOTES

       If  three  or four map layers are specified, the correlation among each combination of two
       data layers is displayed.

EXAMPLE

       Scatterplot of two LANDSAT TM7 channels (North Carolina sample dataset):

       g.region raster=lsat7_2002_30 -p
       d.correlate map=lsat7_2002_30,lsat7_2002_40
       Scatterplot of two LANDSAT TM7 channels

SEE ALSO

        d.text, d.graph, r.coin, r.regression.line, r.stats

AUTHORS

       Michael Shapiro, U.S.Army Construction Engineering Research Laboratory

       Rewritten to GRASS 6 (from csh to sh) by Markus  Neteler;  from  sh  to  Python  by  Glynn
       Clements

       Last changed: $Date: 2015-10-27 18:40:48 +0100 (Tue, 27 Oct 2015) $

SOURCE CODE

       Available at: d.correlate source code (history)

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       © 2003-2018 GRASS Development Team, GRASS GIS 7.4.0 Reference Manual