If this is the case then how to I take a list of numbers (residuals in this case) and create anothe list that is longer and padded by zeros? Maybe fft already does this for me but as I understood it I need to pass an vector to the fft that is of a power of 2 length. If I still need to do this then is there something wrong with the code below?
Thank you. Kevin ---- Uwe Ligges <[EMAIL PROTECTED]> wrote: > > > [EMAIL PROTECTED] wrote: > > I am calling fft and getting a "non-numeric" error: > > > > + fit <- lm(Quantity ~ DayOfYear, .sublist) > > + # Make the time series > > + x <- as.numeric(rep(0,512)) > > + x <- merge(residuals(fit), x) > > + # Transform range to -pi - pi > > + x <- x - pi > > + x <- x * (2 * pi)/(max(x) - min(x)) > > + fft(x) > > > > Error in fft(x) : non-numeric argument > > > > How can I tell what the non-numeric argument is? There is only one argument. > > > > What am I doing wrong? > > > I guess merge() does something different from what you expect and your x > is a data.frame rather than a vector now.... > > Uwe Ligges > > > > > Thank you. > > > > Kevin > > > > > > > > ______________________________________________ > > 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. ______________________________________________ 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.
