Question: Topic Modelling Given an input matrix X with the dimensions ( 1 6 , 1 8 ) and the number of topics is 4 .

Topic Modelling
Given an input matrix X with the dimensions (16,18) and the number of topics is 4.
NMF decomposes a matrix X such that X WxH, W 0, H 0
What is the dimension of matrix W?
(16,4)
(4,16)
(4,18)
(18,4)

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