[R] difference along a vector

[Peter Ehlers]

?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