[R] pca analysis: extract rotated scores?

[Mark Difford]

Hi He Zhang,

>> Is the following right for extracting the scores?
>> ...
>> pca$loadings 
>> pca$score

Yes.

But you should be aware that the function principal() in package psych is
standardizing your data internally, which you might not want. That is, the
analysis is being based on the correlation matrix rather than on the
covariance matrix. The two analyses (and the "default" biplots that issue
from them) have somewhat different properties. You should know about these.

Regards, Mark.
-- 
View this message in context: http://r.789695.n4.nabble.com/pca-analysis-extract-rotated-scores-tp3065061p3067370.html
Sent from the R help mailing list archive at Nabble.com.