Hi,
Is there routines in Octave to do this?
http://en.wikipedia.org/wiki/Non-negative_matrix_factorization

I got the hand on several packages that are distributed under
"personal" licenses or no license at all. I have contacted the authors
and waiting for answers. In case no answer comes, does anybody has an
idea how to proceed?
1. http://www.cc.gatech.edu/~hpark/nmfsoftware.php
2. http://cogsys.imm.dtu.dk/toolbox/nmf/index.html
(this last one includes the routine form this guy)
3. http://www.csie.ntu.edu.tw/~cjlin/nmf/

- The first one present this as license
"
The NMF:DTU Toolbox holds a collection of Non-negative Matrix
Factorization (NMF) algorithms implemented for Matlab™. All code can
be used freely in research and other non-profit applications. If you
publish results obtained with the NMF:DTU Toolbox we kindly ask that
our and other relevant sources are properly cited.
"
the zip file has no COPYING at all

- The second one doesn't say anythign and the zip file has no COPYING file.
- The third one has the following license
http://www.csie.ntu.edu.tw/~cjlin/nmf/COPYRIGHT


Thanks

-- 
M. Sc. Juan Pablo Carbajal
-----
PhD Student
University of Zürich
http://ailab.ifi.uzh.ch/carbajal/

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