Zitat von Gabor Grothendieck <[EMAIL PROTECTED]>: > On Sun, Oct 12, 2008 at 7:24 AM, Oliver Bandel > <[EMAIL PROTECTED]> wrote: [...] > > The input to numericDeriv is not values but an expression. > See the Examples section at the end of ?numericDeriv > The expression given as the first arg > ultimately needs to be evaluated at a value so it needs to > know where to find that value. Note that it defaults > to the caller's environment so we can leave that argument > out if the variable is known to be there: > > X <- 3 > numericDeriv(quote(X^2), "X") [...]
Well, that's quite close to symbolic derivation. I have a dataset, that I want to derive numerically "quote(X^2)" is providing a function. I have a dataset. So I may write my own derivative function? Or is there something as part of the ts-class available? Ciao, Oliver ______________________________________________ R-help@r-project.org 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.
