Factor rotation is the process for interpreting factor matrixes.
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Then the eigenvalues of this empirical moment tensor can be interpreted as the probability of choosing a specific topic and each column of the factor matrix E [ x | h = k ] corresponds to probabilities of words in the vocabulary in the corresponding topic.
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"' Varimax rotation "'is an orthogonal rotation of the factor axes to maximize the variance of the squared loadings of a factor ( column ) on all the variables ( rows ) in a factor matrix, which has the effect of differentiating the original variables by extracted factor.