multiply each row in a matrix by a row IN a vector in R

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I don't want to multiple the entire row by the matrix elementwise. I want to multiply each row of a matrix by its corresponding element in a vector.

It needs to be really fast, too. Does anyone know the quickest way to do this?

for example

oo=matrix(1:3,3,1)
oop=matrix(1:9,3,3,byrow=TRUE)

From those, I want

1 2 3
8 10 12
21 24 27

to be the outputted matrix

asked 53 secs ago

robbieboy74

66