what is the main differences between performing principal component analysis on correlation and covariance? what is principal component analysis? what is the principal component of a pca what is the differences between principal component and covariance analysis what is the difference between pca and correlation analysis? what is the difference between principal component analysis and covariance? what is pca for correlation and covariance what is the difference between correlation and covariance analysis? what is correlation pca and covariance difference between correlation and covariance analysis what is the difference between pca and pca s what is pca correlation why does a pca have a correlation matrix difference between correlation and covariance what is the difference between correlation and covariance is pca same as correlation test? what is the difference between principal components analysis and correlation analysis how to do correlation analysis in pca what is the pca of correlation what is the difference between pca and correlation analysis