DESCRIPTION
r.regression.line 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.
AUTHOR
Dr. Agustin Lobo - alobo@ija.csic.es
Updated to GRASS 5.7 Michael Barton, Arizona State University
Last changed: $Date$