Message-ID: <CAAmySGMCRVre2Jye2xTfOgVbU6u7_qatkF2jUzwV7rX9UJuWOQ@mail.gmail.com>
Date: 2011-10-01T06:09:41Z
From: R. Michael Weylandt
Subject: Returning vector of values shared across 3 vectors?
In-Reply-To: <1317448802.24157.YahooMailNeo@web160705.mail.bf1.yahoo.com>
Try this:
shared <- vec3[ (vec3 %in% vec1) & (vec3 %in% vec2)]
Michael
On Sat, Oct 1, 2011 at 2:00 AM, Chris Conner <connerpharmd at yahoo.com> wrote:
> Help-Rs,
>
> I've got three vectors representing participants:
>
> vec1 <- c(4,5,6,7,8,9,10,11,12,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81)
> vec2 <- c (1,2,3,4,5,6,7,8,9,10,11,12,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66)
> vec3 <- c (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,52)
>
> I'd like to return a vector that contains only the values that are shared across ALL THREE vectors. So the statement would return a vector that looked like this:
> 4,5,6,7,8,9,10,11,12,52
>
> For some reason I initially thought that a cbind and a unique() would handle it, but then common sense sunk in.? I think the sleep deprivation is starting to take it's toll.? I've got to believe that there is a simple solution to this dilema.
>
> Thanks in adance for any help!
> C
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>
>
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