[R] computing differences between consecutive vector elements

[Uwe Ligges]

Dewez Thomas wrote:
> Dear R-users,
> 
> I am a newbie to R so please excuse this naive question for which I couldn't
> seem to find online answers.
> 
> I have this data frame containing a series of locations through time
> (x,y,z,t). I would like to compute the difference in x, y and z between t-1
> and t.
> 
> Sounds easy enough, but how on earth does one loop through vector elements
> and compute this difference?

See ?diff

Hence for a data frame X:
  lapply(X, diff)

Uwe Ligges


> Thanks
> 
> Thomas
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