How to find common elements from multiple vectors?

r vector r-faq
Chares picture Chares · Sep 12, 2010 · Viewed 195.2k times · Source

Can anyone tell me how to find the common elements from multiple vectors?

a <- c(1,3,5,7,9)
b <- c(3,6,8,9,10)
c <- c(2,3,4,5,7,9)

I want to get the common elements from the above vectors (ex: 3 and 9)

Answer

bnaul picture bnaul · Sep 12, 2010

There might be a cleverer way to go about this, but

intersect(intersect(a,b),c)

will do the job.

EDIT: More cleverly, and more conveniently if you have a lot of arguments:

Reduce(intersect, list(a,b,c))

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