3 ms·
Am I missing something or is equation (9) incorrect unless the mean of the random variable x is zero (which is never specified)?
by zmmmmm 7y ago
Am I missing something or is equation (9) incorrect unless the mean of the random variable x is zero (which is never specified)?
- clircle 7y agoYou are correct, eqn 9 is technically wrong. But it is traditional in PCA to de-mean the columns of X.