This is not a homework help list.
---------------------------------------------------------------------------
Jeff Newmiller The ..... ..... Go Live...
DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/Batteries O.O#. #.O#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
---------------------------------------------------------------------------
Sent from my phone. Please excuse my brevity.
zz dd <void1...@gmail.com> wrote:
>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 <void1...@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....
>>
>
> [[alternative HTML version deleted]]
>
>______________________________________________
>R-help@r-project.org mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
