[R] fit sine?

[bogdan romocea]

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: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] 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: zelickr at pdx.edu
> Department of Biology			voice: 503-725-3086
> Portland State University		fax:   503-725-3888
>
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