nipals in the chemometrics package in R

Hello
The solution maybe there but i need to compute it into R if someone can
help me :
(Previously store score vector t in score matrix T; store loading
vector p
in loading matrix P) that's done by nipals in chemometrics
After use of nipals function you have T and P matrix

First : "Calculate the residual matrix of X. Stop if the elements of
Xres
are very small
because no further PCA components are reasonable" :
Xres= X-u.b(T)

u : improved score vector
b: loading vector
X : a mean-centered matrix

Second : Replace X with Xres and continue with step 2 (with nipals
chemometrics...) for calculation of the next PCA
component.

If someone can help me ?
Thank's a lot


2011/12/1 zz dd <void1999 at gmail.com>

Hello
i need some precision about nipals in the chemometrics package in R .

When i use nipals in chemometrics i obtain T and P matrix.

I really don't understand what to do with these two matrix to obtain
the scores for every the component (like in spss fo example)

            Comp1    Comp2   Comp3
quest1 0,8434      0,54333   0,3466
quest2 0,665       0,7655      0,433

Thank you very much for your help
(I know that X=TP+E)... But don't understand else....

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