R help - Sep 2006 - Help

Hello,
  I am a new user of R statistical project. So, I have a matrix (4 columns and
330 rows) and I would like to have PCA (Principal Component Analysis). Besides,
I would like to draw every 30 rows from 330 with a different colour but I don’t
know how.
  Could you help me by showing how can I draw every 30 rows with a different
colour?
  Thank you very much
Selim
 		
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Do you mean something like this?
> mat <- cbind(rnorm(330),rnorm(330),rnorm(330),rnorm(330))
> head(mat)
           [,1]        [,2]        [,3]       [,4]
[1,] -0.4668818  0.03015618 -0.72568113  0.6053179
[2,] -0.2625691 -2.20022333 -0.93728544  0.5455864
[3,] -3.4599164  0.71049089 -0.91545599 -1.6744806
[4,] -1.2757082 -1.27079001  0.95844728 -0.1208091
[5,]  0.7761458 -0.38686485 -1.51233490 -2.0337612
[6,]  0.5032718  0.40763612  0.08763122  0.9083149
> sel <- seq(1,330,by=30)
> matplot(t(mat[sel,]),type="b",pch=15)
For principal components analysis, ?princomp or ?prcomp
On 14/09/06, Ben Salah Mohamed Selim <bsmstn@yahoo.fr>
wrote:
>
> Hello,
>   I am a new user of R statistical project. So, I have a matrix (4 columns
> and 330 rows) and I would like to have PCA (Principal Component Analysis).
> Besides, I would like to draw every 30 rows from 330 with a different
colour
> but I don't know how.
>   Could you help me by showing how can I draw every 30 rows with a
> different colour?
>   Thank you very much
> Selim
>
> ---------------------------------
> Découvrez un nouveau moyen de poser toutes vos questions quelque soit le
> sujet ! Yahoo! Questions/Réponses pour partager vos connaissances, vos
> opinions et vos expériences. Cliquez ici.
>         [[alternative HTML version deleted]]
>
>
>
> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
>

-- 
================================David Barron
Said Business School
University of Oxford
Park End Street
Oxford OX1 1HP

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I am a teaching asistant at Ankara University. I try to analize ABD stock market
returns.I want to compare coefficients of variation. But some of means are
positive, some of means are negative. In this instance , how can compare
coefficients of variation?
  Could you help me,please?
  Thanks...
  Sincerely...

 		
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hi, experts

i do additive models analysis by mgcv. i want to extract every
smoothing componets from the gam object. how can i do ?
Thanks!

-- 

Sincerely yours,

Liu, jcheng

Department of Biomedical Engineering,

School of Medicine, Tsinghua University,

Beijing, 100084, China.