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Non-negative Matrix Factorization


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



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