On 8/11/2008 11:26 AM, dott wrote:
Hi,
I'd like to take difference for a sequence a between a_i and a_i-2, for
instance,
a<-c(2,3,4,8,1)
I need (2, 5, -3) as a result. If not using a for loop, can anyone help me?
Thanks a lot.
Dot
a <- c(2,3,4,8,1)
diff(a, lag=2)
[1] 2 5 -3
?diff
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