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samdon / pmtk3

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hmmFit & generativeClassifierFit chol->matrix is not positive definite #20

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1.Fitting a HMM on observations and setting the nr of States higher than 2
2. This is a Gauss or GaussMixTied
3. It works normal with 1xT(i)  sequences

What is the expected output? What do you see instead?
An error is generated at the next line with  generativeClassifierFit. Chol 
seems to be the problem in gaussLogprob at line 52

What version / revision of the product are you using? On what operating
system? Edition pmtk3 28feb 2011, Matlab R2007b, Ubuntu

Please provide any additional information below.
File is based on 
http://pmtk3.googlecode.com/svn-history/r2517/trunk/docs/tutorial/html/tutGenCla
ssif.html

Original issue reported on code.google.com by annelies...@gmail.com on 14 Mar 2011 at 2:03

Attachments:

GoogleCodeExporter commented 9 years ago 
There was a numerical problem in Matlab that caused this issue. The problem is 
now solved!

Original comment by annelies...@gmail.com on 21 Mar 2011 at 8:45

GoogleCodeExporter commented 9 years ago 
Hi 

 I have the  same  problem . How can I solve it?

 Regards

Original comment by pistolas...@googlemail.com on 22 May 2013 at 10:27

GoogleCodeExporter commented 9 years ago 
Moved to GitHub: https://github.com/probml/pmtk3/issues/20

Original comment by irosen on 4 Jan 2014 at 2:34