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<H2>DESCRIPTION</H2>

<EM>r.regression.line</EM> Calculates linear regression from two raster maps, 
according to the formula y = a + b*x, where x and y represent raster maps. 
Optionally saves regression coefficients to an ASCII file.
<br>

<H2>EXAMPLE</H2>

Comparison of the old and the new DEM in Spearfish:
<PRE>
g.region rast=elevation.10m
r.regression.line elevation.dem map2=elevation.10m
</PRE>

<H2>AUTHOR</H2>

Dr. Agustin Lobo - alobo@ija.csic.es<BR>
Updated to GRASS 5.7 Michael Barton, Arizona State University

<p><i>Last changed: $Date: 2005/08/30 14:57:42 $</i>