Nathan Sutter

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We derive a number of well known deterministic latent variable models such as PCA, ICA, EPCA, NMF and PLSA as variational EM approximations with point posteriors. We show that the often practiced heuristic of “folding-in” can lead to overly optimistic estimates of the test-set log-likelihood and we verify this result experimentally. We trace this problem(More)
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