Extraction of columns from two matrices

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Hi:

Is this what you have in mind?

m1 <- matrix(rpois(100, 10), nrow = 10, dimnames = list(NULL,
paste('V', 1:10, sep = '')))
m2 <- matrix(rpois(40, 10), nrow = 10, dimnames = list(NULL,
paste('V', c(2, 5, 7, 10), sep = '')))
colnames(m1)
colnames(m2)

m1[, colnames(m2)]

HTH,
Dennis

On Wed, May 4, 2011 at 11:10 PM, nisha chandran
Hi,

I have two matrices with 4885 cols and 36 cols respectively . I would like
to extract these 36 columns from the bigger matrix, the column values are
different but the column names would be the same.Hence based on the names I
would like to perform my operation. So is there any way of extracting this
info in an easy way. I have tried names,which,grep,subset none have worked.
Could someone help me out here

Thanks a ton
Nisha

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