negative data input to nmf (non-negative matrix factorization)

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khuzaima 2014-8-18

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https://ww2.mathworks.cn/matlabcentral/answers/151296-negative-data-input-to-nmf-non-negative-matrix-factorization

评论： siva singireddi 2019-5-20

I want to apply non-negative matrix factorization on a data matrix of gene expression, but the matrix contain negative as well as positive data. the problem is Nmf does n't accept negative data. what should I do to make nmf work on this matrix??

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siva singireddi 2019-5-20

you must need to convert that matrix into positive.if you are analyzing the signals you will apply fft or stft technique to convert that matrix into positive these are the tools which convert the matrix, negative to positive.if you are analyzing the some elements please convert that negative elements into positive.

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