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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




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