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Principal component analysis (PCA) is a linear dimensionality reduction technique. It reduces a multivariate dataset to a smaller set of constructed variables preserving as much information (as much variance) as possible. These variables, called principal components, are linear combinations of the input variables.

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Reducing the number of variables by PCA vs. by clustering the features

Hence, my first suggestion: Try LSA rather than PCA. … Fourth suggestion: You may still give PCA a try, if the aforementioned stuff didn't solve your problem! …
Annamalai N's user avatar