[R] How to remove similar successive objects from a vector?

From: Atte Tenkanen <attenka_at_utu.fi>
Date: Wed 16 Aug 2006 - 17:42:35 EST


Is there some (much) more efficient way to do this?

VECTOR=c(3,2,4,5,5,3,3,5,1,6,6);
NEWVECTOR=VECTOR[1]; for(i in 1:(length(VECTOR)-1))
{

	if((identical(VECTOR[i], VECTOR[i+1]))==FALSE){
		NEWVECTOR=c(NEWVECTOR,VECTOR[i+1])}

}

> VECTOR

 [1] 3 2 4 5 5 3 3 5 1 6 6
> NEWVECTOR

[1] 3 2 4 5 3 5 1 6



Atte Tenkanen
University of Turku, Finland

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