# Re: [R] Are any values in one list contained within a second list

From: Phil Spector <spector_at_stat.berkeley.edu>
Date: Sun, 13 Jun 2010 12:25:24 -0700 (PDT)

I think the simplest way is to translate the English directly :-)

> list1 = c('a','b','c','d','e','f','g')
> list2 = c('z','y','x','w','v','u','b')
> any(list2 %in% list1)

[1] TRUE
> list2 = c('z','y','x','w','v','u','t')
> any(list2 %in% list1)

[1] FALSE

• Phil Spector Statistical Computing Facility Department of Statistics UC Berkeley spector_at_stat.berkeley.edu

On Sun, 13 Jun 2010, GL wrote:

>
> Silly question, but, can I test to see if any value of list a is contained in
> list b without doing a loop? A loop is easy enough, but wanted to see if
> there was a cleaner way. By way of example:
>
> List 1: a, b, c, d, e, f, g
>
> List 2: z, y, x, w, v, u, b
>
> Return true, since both lists contain b
>
> List 1: a, b, c, d, e, f, g
>
> List 2: z, y, x, w, v, u, t
>
> Return false, since the lists have no mutual values
>
>
>
> --
> View this message in context: http://r.789695.n4.nabble.com/Are-any-values-in-one-list-contained-within-a-second-list-tp2253637p2253637.html
> Sent from the R help mailing list archive at Nabble.com.
>
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