[R] subset of rows from matrix

From: Wade Wall <wade.wall_at_gmail.com>
Date: Sat 29 Jul 2006 - 03:24:25 EST

Hi all,

I have a dataframe of rownames that I would like to extract from a larger matrix to form a new matrix. I have tried to use subset, in this manner

x<-subset(largematrix, rownames$names=largematrix$rownames)

where largematrix is the larger matrix and rownames$names is the dataframe with the row names of the rows I want to extract from the larger matrix.

Of course, I get error messages. Any suggestions how I should proceed?



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