[GRASS-user] Error while running i.gensig- Signature 1 not positive definite

Kim Besson kimbesson1981 at gmail.com
Mon Feb 14 18:35:42 EST 2011


I have a training area map and a few landsaty images, and everytime i try to
generate a signature I get this error/warning:
Signature 1 not positive definite

What might be causing this? can this be a problem of my dataset? (must it
range in some interval of values or what is wrong with it)?
How can I avoid this?
And what does it mean Not positive definite?
Kim Besson
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