Read up on the discrete Fourier transform: http://en.wikipedia.org/wiki/Discrete_Fourier_transform http://en.wikipedia.org/wiki/Frequency_spectrum#Spectrum_analysis
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Randy Zelick > Sent: Tuesday, December 19, 2006 2:52 PM > To: R list server posting > Subject: [R] fit sine? > > Hello list, > > I am making scatterplots of data that vary sinusoidally over > 24 hours. > With a bit of previous help from this list, I now can get an > x-axis with > time tics from 00:00 on the left edge to 12:00 in the middle > and 00:00 on > the right edge, i.e., just 24 hours. > > Now I would like to fit a sin function to the plot. I've > looked all over > CRAN and the web in general, but have not found a method or > package for > this. > > Can anyone make a suggestion? > > Thanks, > > =Randy= > > > Using R 2.4.0 on Solaris (unix). > > > R. Zelick email: [EMAIL PROTECTED] > Department of Biology voice: 503-725-3086 > Portland State University fax: 503-725-3888 > > mailing: > P.O. Box 751 > Portland, OR 97207 > > shipping: > 1719 SW 10th Ave, Room 246 > Portland, OR 97201 > > ______________________________________________ > [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. > ______________________________________________ [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.
