[R] Extracting columns from a class

From: nuncio m <nuncio.m_at_gmail.com>
Date: Thu, 17 Mar 2011 17:40:33 +0530


Hi list,

           I am not a frequent user of R. Recently I used R in principal component analysis and got the result as a class, which has information like standard deviation and principal components from 1 to 10. How is it possible to extract the column corresponding to first principal component and write it to a file
the out from prcomp command is something like this

Standard
deviations:

 [1] 3.325801e+00 7.669837e-01 6.625773e-01 4.990732e-01 3.470071e-01  [6] 2.946679e-01 2.206289e-01 1.645828e-01 1.570887e-01 4.741294e-16

Rotation:

               PC1 PC2 PC3 PC4 PC5
[1,] -0.07900624 -0.0824864352 0.1208419434 0.1763425845 0.089545020
[2,] -0.09114708 -0.0901675110 0.1377608881 0.2224127252 0.076620976
[3,] -0.10510742 -0.0935434206 0.1113586044 0.2513993555 0.029783117

I want to extract PC1 and 1 value in the standard deviation

Thanks

-- 
Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
Goa-403804

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Received on Thu 17 Mar 2011 - 12:15:45 GMT

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