i guess nls or gnls should work.... JM
El Viernes, 23 de Mayo de 2008 10:47, Zroutik Zroutik escribió: > Dear R-users, > > I'd like to fit a sine function to my data. The result should have a format > (and thus the formula, too) > > y ~ a + sin(x+b) > > where y and x are vectors, and a and b are (yet) unknown values. > > The data sets (vectors x and y) are OK, and I can do a simple lm fitting > lm(y~x), or lm(y~I(sin(2*pi*x/360))), succesfully My issue is that I'm not > able to do the optional linear shift in x (e.g. x+b). What other > possibilities should I use instead of lm? I looked searched the R-seek for > terms: fit, sine, lm, and combinations, but I could not find anything > useful. Anybody would be so kind and point me to the right direction where > I can find other fitting possibilities? > > Thank you for listening and kind answers upfront. > > Regards, > Milan > > [[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. ______________________________________________ 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.
