Hello all,
I using grass 6.3.0 on a 64 machine (ubuntu 7.10)
When applying i.gensig on a set of 20 rasters for defining 6 different groups I get the following output:
Finding training classes ...
6 classes.
Calculating class means ...
Calculating class covariance matrices...
Signature [1] not invertible.
Signature [2] not invertible.
Signature [3] not invertible.
Signature [4] not invertible.
Signature [5] not invertible.
Signature [6] not invertible.
Writing signature file [DRP_Zemmer] ...
Done.
The problem is:
the signature file is empty.
it may be related to the info Signature [1] not invertible. But I don't know what GRASS wants to tell me.
Can somebody help?
Manuel
--
_______________________________________________________________________
Dr. Manuel Seeger
Wiss. Assistent Scientific Assistant
Physische Geographie Dpt. of Physical Geography
FB VI - Geographie/Geowissenschaften Geography/Geosciences
Universität Trier University of Trier
D - 54286 Trier
Tel.: +49-651-201 4557
Fax: +49-651-201 3976
Web: http://www.uni-trier.de/index.php?id=18521
_______________________________________________________________________
EGU General Assembly 2009
SSS15. Experimental Methods in Soil Erosion Studies
Convener: Seeger, M.
Co-Convener: Kuhn, N.; Quinton, J.
_______________________________________________________________________
On Fri, Oct 24, 2008 at 10:57 AM, Manuel Seeger <seeger@uni-trier.de> wrote:
Hello all,
I using grass 6.3.0 on a 64 machine (ubuntu 7.10)
When applying i.gensig on a set of 20 rasters for defining 6 different
groups I get the following output:
Finding training classes ...
6 classes.
Calculating class means ...
Calculating class covariance matrices...
Signature [1] not invertible.
Signature [2] not invertible.
Signature [3] not invertible.
Signature [4] not invertible.
Signature [5] not invertible.
Signature [6] not invertible.
Writing signature file [DRP_Zemmer] ...
Done.
The problem is:
the signature file is empty.
it may be related to the info Signature [1] not invertible. But I don't know
what GRASS wants to tell me.
I am not sure what happens - apparently
imagery/i.gensig/can_invert.c
fails. Could you try to reduce the number of input maps for
a test?
Markus
Markus Neteler schrieb:
On Fri, Oct 24, 2008 at 10:57 AM, Manuel Seeger <seeger@uni-trier.de> wrote:
Hello all,
I using grass 6.3.0 on a 64 machine (ubuntu 7.10)
When applying i.gensig on a set of 20 rasters for defining 6 different
groups I get the following output:
Finding training classes ...
6 classes.
Calculating class means ...
Calculating class covariance matrices...
Signature [1] not invertible.
Signature [2] not invertible.
Signature [3] not invertible.
Signature [4] not invertible.
Signature [5] not invertible.
Signature [6] not invertible.
Writing signature file [DRP_Zemmer] ...
Done.
The problem is:
the signature file is empty.
it may be related to the info Signature [1] not invertible. But I don't know
what GRASS wants to tell me.
I am not sure what happens - apparently
imagery/i.gensig/can_invert.c
fails. Could you try to reduce the number of input maps for
a test?
Markus
Its long time passed, excuse me
I tried reducing the number of rastermaps I get the same message.
When I transform the rasters first with PCA I get no error!
What is the problem?
Best regards
Manuel
--
_______________________________________________________________________
Dr. Manuel Seeger
Wiss. Assistent Scientific Assistant
Physische Geographie Dpt. of Physical Geography
FB VI - Geographie/Geowissenschaften Geography/Geosciences
Universität Trier University of Trier
D - 54286 Trier
Tel.: +49-651-201 4557
Fax: +49-651-201 3976
Web: http://www.uni-trier.de/index.php?id=18521
_______________________________________________________________________
EGU General Assembly 2009
SSS17. Experimental Methods in Soil Erosion Studies
Convener: Seeger, M.
Co-Convener: Kuhn, N.; Quinton, J.
http://meetingorganizer.copernicus.org/EGU2009/session/930
_______________________________________________________________________