[GRASS-SVN] r43711 - grass/trunk/raster/r.regression.line

[svn_grass at osgeo.org]

Author: mmetz
Date: 2010-09-27 18:11:31 +0000 (Mon, 27 Sep 2010)
New Revision: 43711

Modified:
   grass/trunk/raster/r.regression.line/main.c
   grass/trunk/raster/r.regression.line/r.regression.line.html
Log:
update manual: no more -s flag (slower but more accurate), only option is much faster and accurate

Modified: grass/trunk/raster/r.regression.line/main.c
===================================================================
--- grass/trunk/raster/r.regression.line/main.c	2010-09-27 18:03:56 UTC (rev 43710)
+++ grass/trunk/raster/r.regression.line/main.c	2010-09-27 18:11:31 UTC (rev 43711)
@@ -3,13 +3,15 @@
  *
  *   Calculates linear regression from two raster maps: y = a + b*x
  *   Copyright (C) 2010 by the GRASS Development Team
- *   Author(s): Markus Metz
+ *   Author(s): original author Dr. Agustin Lobo
+ *              Markus Metz (conversion to C for speed)
  *
  *      This program is free software under the GNU General Public
  *      License (>=v2). Read the file COPYING that comes with GRASS
  *      for details.
  *
  *   This program is a replacement for the r.regression.line script
+ *   (the C version is up to 200x faster than the script version)
  */
 
 #include <stdio.h>

Modified: grass/trunk/raster/r.regression.line/r.regression.line.html
===================================================================
--- grass/trunk/raster/r.regression.line/r.regression.line.html	2010-09-27 18:03:56 UTC (rev 43710)
+++ grass/trunk/raster/r.regression.line/r.regression.line.html	2010-09-27 18:11:31 UTC (rev 43711)
@@ -10,9 +10,7 @@
 regression model as a whole (F).
 
 <H2>NOTES</H2>
-The flag <em>-s</em> select the slower method (applies to FP maps only)
-which writes out all pixel values individually to the temporary file.
-The results for offset/intercept (a) and gain/slope (b) are then
+The results for offset/intercept (a) and gain/slope (b) are 
 identical to that obtained from R-stats's lm() function. 
 
 <H2>EXAMPLE</H2>
@@ -44,6 +42,7 @@
 
 Dr. Agustin Lobo - alobo at ija.csic.es<BR>
 Updated to GRASS 5.7 Michael Barton, Arizona State University<BR>
-Script style output Markus Neteler
+Script style output Markus Neteler<BR>
+Conversion to C module Markus Metz
 
 <p><i>Last changed: $Date$</i>