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

SOURCE CODE

       Available at: d.correlate source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual