[R] data management on R

[Jim Lemon]

zhijie zhang wrote:
> Dear friends,
>  i have two dataset: A and B
> A:
>  x  y
> 1  2
> 3  4
> 
> B:
>  m  n
>  1   2
> 7   8
> 
> How to generate datasetC:
> C:
>  x  n
>  1   2
> 3   8
>  i know sas can do it easily, what about R?
> 
A<-data.frame(x=c(1,3),y=c(2,4))
B<-data.frame(m=c(1,7),n=c(2,8))
C<-data.frame(A[1],B[2])

Using single square brackets extracts just the named vectors.

Jim