If I have two matrices:

> a<-matrix(1:5,ncol=1)

     [,1]
[1,]    1
[2,]    2
[3,]    3
[4,]    4
[5,]    5
> b<-matrix(1:50,ncol=10)

     [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,]    1    6   11   16   21   26   31   36   41    46
[2,]    2    7   12   17   22   27   32   37   42    47
[3,]    3    8   13   18   23   28   33   38   43    48
[4,]    4    9   14   19   24   29   34   39   44    49
[5,]    5   10   15   20   25   30   35   40   45    50

How can I add a[1,1] to each column in the first row of b.
and the then add a[2,1] to each column in second row of b
and so on.

I know there must be a way to use the apply function or nested for loops but
I can't seem to get it working in R.
thanks,
michael

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