[GRASS-stats] How to calculate the Bhattacharyya distance/index?

[Nikos Alexandris]

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