row.names need reordering

Hi,

The row.names in my matrix seem to be out of order. I don't remember
putting row.names in in the first place, I don't see what use they are,
and they are out of order (perhaps because I sorted them at one point when
the data was in data.frame format). Can I delete the rownames? or at least
just reorder them in proper order? I know how to delete them -- how do I
reorder them sequentially?

Thanks,

Anders Corr