[GRASS-user] supervised classification "no subgroup files available"

[Markus Neteler]

On Thu, Sep 4, 2008 at 6:24 PM, Silvia Simoni
<silvia.simoni at ing.unitn.it> wrote:
>
> Thanks Markus!
>
> I'm now using grass6.4.svn but I still have trouble with the supervised
> classification process. Now I can run i.class and produce the spectral
> signature for my map but this file is NOT readable by i.maxlik. I get the
> following message:  Can't read signature file [signaturefile].
>
> I checked in $MAPSET/group/subgroup/$SUBGROUP/sig/; the signaturefile is
> there but it only contains 3 lines, as follows:
> #
> #comment
> single value XXXX
>
> Is this correct? I obtained other signature files from i.cluster which look
> different from this. It seems to me that i.class doesn't write the signature
> file correctly so that i.maxlik is not able to read it.

It doesn't look good.
But a quick test here didn't show any problem.
Are you sure that
- your training areas are big enough in i.class?
- that you close the training areas with the "complete" button?

Markus