[R] numeric derivation
oliver at first.in-berlin.de
Sun Oct 12 15:45:44 CEST 2008
Zitat von Gabor Grothendieck <ggrothendieck at gmail.com>:
> If you simply want successive differences use diff:
> x <- seq(4)^2
> tx <- ts(x)
Oh, cool, thanks.
But what about diff / delta_t ?
Do I have to calculate it by my own, or is there
already a function for making a difference-qoutient?
This would be fine to have, because for example
coming from space vs. time to velocity vs. time
and acceleration vs. time (and further derivatives)
are also a time-series.
The possibility of using the advantages of the time series class here,
would be fine.
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