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projecting nlpca to new data sets #2
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It is quite some time ago since I worked with this but I agree, I don't see a reason why this shouldn't be possible. The implementation doesn't allow for it since the |
I just re-read the corresponding paper and there is a catch: I think nlPCA in pcaMethods only implements the decoder part of an autoencoder and optimizes the representation in reduced dimensions, therefore there is no easy way from data space to nl-PCA space and new points have to be optimized via gradient descent or a similar method. |
Indeed, not straight-forward.. Closing this one. |
I'd like to estimate an autoencoder from one data set and apply it to another with the same number of variables but with a different number of rows.
I can't think of a analytical reason that this wouldn't work.
Thanks
(related to tidymodels/recipes#35)
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