[R] subset of rows from matrix

[Wade Wall]

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?

Thanks

Wade