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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