why do i get a column from a pca analysis does principal component analysis preserve observations of the data what is pca in principal component analysis do you save a sample for pca analysis do pca preserve data does pca preserve data how to preserve observations in pca which pca function does principal component analysis do? how do you preserve observational data do pca keep sample data in matrix what is the pca used for? what does pca data do pca preserve observations does pca preserve data does pca preserve features is pca same as data from original matrix how to preserve data on pca how to preserve observations in a data matrix how does pca preserve observations when do i select a row from a data file?