Have you done any homework. help.search() or ... spectrum will produce a spectrum and fft is the underlying function.
On Fri, Mar 13, 2009 at 2:46 PM, Vittorio Colagrande <colavitto...@virgilio.it> wrote: > Dear R-help members, > > To whom it may concern, our research group is conducting a study to evaluate > the predictive > value of 24 hour blood pressure variability. > We are looking for an R routine that performs a fast Fourier transform > spectral analysis > (with an output of the approximation function of the Fourier and estimates > the validity > of the model for the various harmonics). > Thanks > Vittorio Colagrande > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > -- Stephen Sefick Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being mammals. -K. Mullis ______________________________________________ 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.
