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There's an odd jump in this narrative. PCA is indeed a great technique, but the essay goes from PCA to neural nets without explaining why. PCA was around for a
by drongoking 7y ago
There's an odd jump in this narrative. PCA is indeed a great technique, but the essay goes from PCA to neural nets without explaining why. PCA was around for a long time before NNs and there are fast incremental ways to do it. Why bother with a million-weight NN if PCA will do the job?
- escanor 7y agoMy understanding is that the neural network is used to predict the "magnitude" of each eigenvector/axe (extracted by using PCA) in order to reconstruct an approximation of the original behavior.