what is pca in math what is the basic use of pca what is pca used for how to use pca what is pca used for what is pca can pca be used for dimensionality reduction when you use pca for dimensionality reduction you find that why use pca and how are pca and eigenvectors used? pca definition is pca used for dimensionality reduction how much of dimensionality is pca how do you use pca in modeling can eigenvectors be used as representations of pca how to use pca in a problem with dimensionality what is pca used for when to use pca for dimensionality when to use pca how pca is a useful program what is pca used for