User talk:197.237.1.233

PCA was invented in 1901 by Karl Pearson, as an analogue of the principal axis theorem in mechanics; it was later independently developed and named by Harold Hotelling in the 1930s. It's a branch of Mathematical Statistics.

Its existence precedes computers - way before the concept of "Machine Learning" existed. How is this being attributed as a field of Machine Learning / Artifical Intelligence, as opposed to Mathematics/Statistics?