[R] Adding Two Vectors (was: no subject)

[Marc Schwartz]

On Tue, 2005-11-01 at 12:39 +0200, Erez wrote:
> Hi
> 
> I need an advise if any one can help me.
> i have mass of data in 2 array A and B:
> A = 0 1 0 0 1 1 0 0 
> B = 0 0 0 1 0 1 1 1
> and i have 3 rules to merge them into 3rd array C:
> if A[i] + B[i] == 0 then C[i]=0 
> if A[i] + B[i] == 1 then C[i]=1
> if A[i] + B[i] == 2 then C[i]=2
> it looks easy but with the regular way (loop) with large data it takes days (i test it).
> If any one can advise me what to do i'll be happy.
> 
> Thanks
> Erez  
>  

[I did not see a reply to this. The date indicates that it was sent on
Tuesday, but I just got it today]


Please use an informative subject.

What's wrong with just adding the two vectors, if the rules are as
simple as you indicate?

> A
[1] 0 1 0 0 1 1 0 0

> B
[1] 0 0 0 1 0 1 1 1

> C <- A + B

> C
[1] 0 1 0 1 1 2 1 1


HTH,

Marc Schwartz