[R] Intersection of 2 matrices
David Winsemius
dwinsemius at comcast.net
Fri Dec 2 14:48:59 CET 2011
On Dec 2, 2011, at 4:20 AM, oluwole oyebamiji wrote:
> Hi all,
> I have matrix A of 67420 by 2 and another matrix B of 59199 by
> 2. I would like to find the number of rows of matrix B that I can
> find in matrix A (rows that are common to both matrices with or
> without sorting).
>
> I have tried the "intersection" and "is.element" functions in R but
> it only working for the vectors and not matrix
> i.e, intersection(A,B) and is.element(A,B).
Have you considered the 'duplicated' function?
--
David Winsemius, MD
West Hartford, CT
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