Re: Non-negative Matrix Factorization
- To: mathgroup at smc.vnet.net
- Subject: [mg105387] Re: Non-negative Matrix Factorization
- From: dh <dh at metrohm.com>
- Date: Tue, 1 Dec 2009 04:11:55 -0500 (EST)
- References: <hf09gc$d4u$1@smc.vnet.net>
å?æ?º wrote: > Hi community, > I'm dealing with a problem which needs NMF(Non-negative Matrix > Factorization). > I've looked up the document along with Mathematica, but nothing found. > And I've tried to implement one function, however, the efficiency is too > poor in comparison with built-in SingularValueDecompostion[]. > Is there any implement of NMF? > > Thank you all! > > sunt > > Hi, your problem is ill defined. One may factor a non negative matrix in infinite many ways. It all depends on further qualities of the matrix and the aim one want to achieve. Is there a reason why is "Eigensystem" or "SingularValueDecompostion", although they do not care about non-negativity, does not suit you? Daniel