Zitat von Gabor Grothendieck <[EMAIL PROTECTED]>: > If you simply want successive differences use diff: > > x <- seq(4)^2 > diff(x) > > tx <- ts(x) > diff(tx) [...]
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. Ciao, Oliver ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
