I like to multiple the first and second column of a 10 x 3 matrix by
100. The following did not work. I need this in an operation with a
much larger scale. Any help?
aa<-matrix(1:30,nrow=10,ncol=3); aa
bb<-matrix(c(100,100,1),nrow=1,ncol=3); bb
dim(aa)
dim(bb)
aa*bb
Results:
> aa<-matrix(1:30,nrow=10,ncol=3); aa
[,1] [,2] [,3]
[1,] 1 11 21
[2,] 2 12 22
[3,] 3 13 23
[4,] 4 14 24
[5,] 5 15 25
[6,] 6 16 26
[7,] 7 17 27
[8,] 8 18 28
[9,] 9 19 29
[10,] 10 20 30
> bb<-matrix(c(100,100,1),nrow=1,ncol=3); bb
[,1] [,2] [,3]
[1,] 100 100 1
> dim(aa)
[1] 10 3
> dim(bb)
[1] 1 3
> aa*bb
Error in aa * bb : non-conformable arrays
>
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