On Thu, Apr 15, 2010 at 11:50 AM, joel dinis <[email protected]> wrote: > Hello list, > > I'm with a problem running the i.gensig. > I do: > > i.gensig trainingmap=areasras...@portugal_9 group=gr...@portugal_9 > subgroup=subgrupo signaturefile=assinaturascomareas > > where areasrastes has 4 classes. > The *r.stats -c input=areasras...@portugal_9* is > 1 92 > 2 234 > 3 2434 > 4 3016 > * 287024 > > And I get the following: > > Finding training classes... > 4 classes found > Calculating class means... > Calculating class covariance matrices... > Signature 1 not invertible > Signature 2 not invertible > Signature 3 not invertible > Signature 4 not invertible > i.gensig complete. > > My question is: do I need any package to deal with > matrix calculus?
No, that's not needed (nor possible). > If so, each? If not, what is wrong here? I suspect that either the training areas are suboptimal or are too small. Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
