Re: [R] computing differences between consecutive vector elements

From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>
Date: Wed 28 Jul 2004 - 03:55:36 EST

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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R-help@stat.math.ethz.ch mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Wed Jul 28 04:02:11 2004

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