[R] Deltas or changes
bolker at ufl.edu
Tue Mar 9 15:02:47 CET 2010
Henrique Dallazuanna <wwwhsd <at> gmail.com> writes:
> Reduce("/", as.data.frame(embed(x, 2)))
> ManInMoon <xmoon2000 <at> googlemail.com> wrote:
> > How can I generate a vector of differences between each
> elemtn of an vector?
(you mean ratios, right?)
> > i.e. a[i]=x[i]/x[i-1]
might be a little easier to understand.
exp(diff(log(x))) should work too (although
a big waste of computational power ...)
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