Dear R users:
> # p is a vector if length 10
> # a is a vector if length 3
> # I like to create a matrix with
> # the first column being p multiplied by a[1]
> # the second column being p multiplied by a[2]
> # the third column being p multiplied by a[3]
> # The following would do that:
>
> a<-c(10,100,1000); a
[1] 10 100 1000
> p<-matrix(1:10,nrow=10); p
[,1]
[1,] 1
[2,] 2
[3,] 3
[4,] 4
[5,] 5
[6,] 6
[7,] 7
[8,] 8
[9,] 9
[10,] 10
> cbind(a[1]*p,a[2]*p,a[3]*p)
[,1] [,2] [,3]
[1,] 10 100 1000
[2,] 20 200 2000
[3,] 30 300 3000
[4,] 40 400 4000
[5,] 50 500 5000
[6,] 60 600 6000
[7,] 70 700 7000
[8,] 80 800 8000
[9,] 90 900 9000
[10,] 100 1000 10000
>
> # Gauss does it easily with an element-by-element
> # multiplicationa.*p
> # How can I do this in R?
>
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