help.search("difference")
would lead you to
?diff, see the lag argument
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.