Re: [R] nipals in the chemometrics package in R

2011-12-05 Thread zz dd
That's solved. Just a cor between X and ti values. Thank you all. 2011/12/5 zz dd > Thank's Pedro Madrones, > you're right that i have removed my name of the email (because of Spam, > and datas that i can't remove on the net). > Ok, i explain a bit more : > > X is a centred matrix. > PCA summar

Re: [R] nipals in the chemometrics package in R

2011-12-05 Thread zz dd
Thank's Pedro Madrones, you're right that i have removed my name of the email (because of Spam, and datas that i can't remove on the net). Ok, i explain a bit more : X is a centred matrix. PCA summarise all variation of X into a few new variables called scores T.These new variables are linearly we

Re: [R] nipals in the chemometrics package in R

2011-12-05 Thread Pedro Mardones
Perhaps you can try the examples given in http://www.jstatsoft.org/v18/i02 for getting a better idea about how the NIPALS algorithm works. BTW, yes,it looks like a homework question specially when your user name is "zz dd " so you can't be recognized. On Mon, Dec 5, 2011 at 9:27 AM, zz dd wrote

Re: [R] nipals in the chemometrics package in R

2011-12-05 Thread zz dd
Thank you for your brevity you don't have to say more things to show who you are. Else if you don't understand what we are talking about, you shouldn't be rude and insulting. May be you are quite young please take time to read Nonaka and Takeuchi and moreover Takanashi to uderstand the way to go f

Re: [R] nipals in the chemometrics package in R

2011-12-05 Thread Jeff Newmiller
This is not a homework help list. --- Jeff NewmillerThe . . Go Live... DCN:Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#..

Re: [R] nipals in the chemometrics package in R

2011-12-05 Thread zz dd
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

Re: [R] nipals in the chemometrics package in R

2011-12-01 Thread Bryan Hanson
zz dd: If you want a typical score plot, say PC1 vs PC2, then plot the first and second columns of your score matrix (T) against each other and label the points with the row names (if available) or create a text label from where ever you have this information stored. To get an unlabeled score

[R] nipals in the chemometrics package in R

2011-12-01 Thread zz dd
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) Comp1Comp2 C