[R] Multiply row of a matrix
ac.dasilva at ulg.ac.be
ac.dasilva at ulg.ac.be
Tue Feb 21 17:23:30 CET 2017
If we have the following matrix:
Mat<-matrix(1:9, byrow=TRUE, nrow=3)
Mat
[,1] [,2] [,3]
[1,] 1 2 3
[2,] 4 5 6
[3,] 7 8 9
I would like to have each row multiplied by a different number.
So I would like row 1 multiplied by 3, row2 by 1 and row3 by 0.5
Which would give:
[,1] [,2] [,3]
[1,] 3 6 9
[2,] 4 5 6
[3,] 3.5 4 4.5
Whatever I try, I always obtain
[,1] [,2] [,3]
[1,] 3 2 1.5
[2,] 12 5 3.0
[3,] 21 8 4.5
Which corresponds to the columns multiplied by the factors
Could anyone help we to get the proper result ?
Best, Anne-Christine da Silva
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