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tp4649764p4649775
2012 Nov 16
4
Multiple Vector with matrix in R
Hi
Can someone show me an easy way to multiple a weighted vector with an
matrix?
example below
mat1<-matrix(sample(1:100,80,replace=TRUE),ncol=8)
w <- 1/1:10
I want the first element in w to be multiplied by the first row of mat1 and
2nd element in w to be multiplied with the 2nd row and so on.
I have huge matrix is there an easy way other than diag(w)%*%mat1
Thanks
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