From: Liaw, Andy <andy_liaw_at_merck.com>

Date: Thu 15 Jul 2004 - 06:19:47 EST

R-help@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jul 15 06:29:12 2004

Date: Thu 15 Jul 2004 - 06:19:47 EST

When all else fails, RTFM; e.g., see ?princomp and read it in its entirety.
Then maybe also try running example(princomp).

Andy

*> From: Herman, David (NIH/NIMH)
**>
*

> Hello,

*> I'm attempting to run a PCA on an example data
**> set. I ran it
**> just fine, but I don't know how to few the output? I listed what the
**> variable got stored in it, but I don't know how I can get
**> anything else out
**> of it. Are there other ways to view the results?
**> Also, I'm confused about the last line "6 variables and 8
**> observations"
**> Aren't the rows the variables and the columns the observations?
**>
**> (NOTE: if anyone knows a good guide for doing a PCA on an
**> example data set,
**> from start to finish, it would be greatly appreciated)
**>
**> > m
**> [,1] [,2] [,3] [,4] [,5] [,6]
**> [1,] 1 2 3 4 5 6
**> [2,] 3 4 3 7 8 1
**> [3,] 1 2 3 4 5 6
**> [4,] 8 7 4 1 4 3
**> [5,] 1 2 3 4 5 6
**> [6,] 4 5 8 2 1 3
**> [7,] 9 8 7 6 7 8
**> [8,] 1 3 7 3 5 0
**> > pc.cr<-princomp(m,cor=TRUE)
**> > pc.cr
**> Call:
**> princomp(x = m, cor = TRUE)
**>
**> Standard deviations:
**> Comp.1 Comp.2 Comp.3 Comp.4 Comp.5
**> Comp.6
**> 1.545609e+00 1.407093e+00 9.886649e-01 7.539927e-01 2.919276e-01
**> 2.460515e-09
**>
**> 6 variables and 8 observations.
**> >
**>
**> thanks!
**> Dave
**>
**> [[alternative HTML version deleted]]
**>
**> ______________________________________________
**> R-help@stat.math.ethz.ch mailing list
**> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
**> PLEASE do read the posting guide!
**> http://www.R-project.org/posting-guide.html
**>
*

>

R-help@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jul 15 06:29:12 2004

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