1d.correlate(1)                Grass User's Manual               d.correlate(1)
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NAME

6       d.correlate   -  prints  a graph of the correlation between data layers
7       (in pairs)
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KEYWORDS

10       display, diagram
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SYNOPSIS

13       d.correlate
14       d.correlate help
15       d.correlate      layer1=string      layer2=string       [layer3=string]
16       [layer4=string]   [--verbose]  [--quiet]
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18   Parameters:
19       layer1=string
20           raster input map
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22       layer2=string
23           raster input map
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25       layer3=string
26           raster input map
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28       layer4=string
29           raster input map
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DESCRIPTION

32       d.correlate  is  a  shell  (sh(1)) script that graphically displays the
33       results of an r.stats run on two raster map layers.  This shell  script
34       is  useful  for highlighting the correlation (or lack of it) among data
35       layers (scattergram).
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37       The results are displayed in the active display  frame  on  the  user's
38       graphics  monitor.  d.correlate erases the active frame before display‐
39       ing results.
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OPTIONS

42   Parameters:
43       layer1 layer2 [layer3 [layer4]]
44              The names of from two to four existing raster map layers  to  be
45              included in the correlation.
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NOTES

48       This  is  a  shell script that uses r.stats and the UNIX awk command to
49       calculate the correlation  among  data  layers,  and  uses  d.text  and
50       d.graph to display the results.
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52       If  three  or four map layers are specified, the correlation among each
53       combination of two data layers is displayed.
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FILES

56       This program is simply a shell script.  Users are  encouraged  to  make
57       their  own  shell  script programs using similar techniques.  See $GIS‐
58       BASE/scripts/d.correlate.
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SEE ALSO

61       The UNIX awk command
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63       d.text, d.graph, r.coin, r.stats
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AUTHOR

66       Michael Shapiro, U.S.Army Construction Engineering Research Laboratory
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68       Rewritten to GRASS 6 (from csh to sh) by Markus Neteler
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70       Last changed: $Date: 2005-05-18 13:19:25 +0200 (Wed, 18 May 2005) $
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72       Full index
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74       © 2003-2008 GRASS Development Team
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78GRASS 6.3.0                                                     d.correlate(1)