How to remove rows of a matrix by row name, rather than numerical index?

Question

I have matrix g:

> g[1:5,1:5]
        rs7510853 rs10154488 rs12159982 rs2844887 rs2844888
NA06985 \"CC\"      \"CC\"       \"CC\"       \         


        

Answer 1

I use "setdiff" as follows:

g[setdiff(rownames(g),remove),]