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The relationship between SCORE and LOADING from PCA using princomp in MATLAB

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Torsionfree
Torsionfree on 30 Nov 2013
I'm doing PCA using princomp.
I'd like to confirm score is derived from X and loading. As far as I know, score = X*loading
My code is [loadb fact] = princomp( X , 'econ' );
But, "X*loadb" and "fact" are different.
Is there anybody explain how can I get score from loading and X?

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