?diff and look at argument 'lag'.
On 2010-05-12 13:06, Clark Johnston wrote:
I was looking for a function which would take the difference along a vector?
a<-c(1,12,23,44,15,28,7,8,9,10)
if I set the number difference to 3 would return
43
2
5
-37
-7
-19
3
or do I need to write my own function for this.
--
Peter Ehlers
University of Calgary
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