On Sat, 2009-02-14 at 14:27 +0100, Nikos Alexandris wrote: [...] > I have 42 samples (number of > pixel varies and is not really too big) extracted from: > > (1) a 3x3 matrix with columns MODIS prefire.band2, prefire.band 6 and > prefire.band7 > > (2) a 3x3 matrix with columns MODIS postfire.band2, postfire.band 6 > and > postfire.band 7 [...]
Sorry, the above is unclear! I have 42 vector *boxes* (not all of them are rectangulars, manually digitised samples) which I used to extract pixels from MODIS, prefire and postfire (bands 2, 6 and 7 respectively). I hat put the prefire samples in a matrix "xxx rows by 3 columns" and the same for the postfire samples. Then I try to run the function. I see that my mistake is that I put them all-together!? I should compare them band-wise probably. Nikos _______________________________________________ grass-stats mailing list grass-stats@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-stats