[R] Renaming names in R matrix

[Gundala Viswanath]

I have the following matrix:
> dat

                      [,1]      [,2]       [,3]        [,4]
foo 0.7574657 0.2104075 0.02922241 0.002705617
foo 0.0000000 0.0000000 0.00000000 0.000000000
foo 0.0000000 0.0000000 0.00000000 0.000000000
foo 0.0000000 0.0000000 0.00000000 0.000000000
foo 0.0000000 0.0000000 0.00000000 0.000000000
foo 0.0000000 0.0000000 0.00000000 0.000000000

and given this:

> new_names <- c("k0","k1","k2,"k3","k4","k5");


How can I get this?


                      [,1]      [,2]       [,3]        [,4]
k0 0.7574657 0.2104075 0.02922241 0.002705617
k1 0.0000000 0.0000000 0.00000000 0.000000000
k2 0.0000000 0.0000000 0.00000000 0.000000000
k3 0.0000000 0.0000000 0.00000000 0.000000000
k4 0.0000000 0.0000000 0.00000000 0.000000000
k5 0.0000000 0.0000000 0.00000000 0.000000000

best,
GV.