Hi r-help-boun...@r-project.org napsal dne 24.07.2010 11:48:11:
> > Thanks Murphy and pikal, > > I need another help,for fitting first fourier transformation ,i used > following thing .Please advise on this > > > beer_monthl has 400+ records > > EXample: > > head(beer_monthly) > beer > 1 93.2 > 2 96.0 > 3 95.2 > 4 77.1 > 5 70.9 > 6 64.8 > > > > > time<-seq(1956,1995.2,length=length(beer_monthly)) Even this is "not working" time<-seq(1956,1995.2,length=length(beer_monthly)) Error in seq.default(1956, 1995.2, length = length(beer_monthly)) : object 'beer_monthly' not found > sin.t<-sin(2*pi*time) > cos.t<-cos(2*pi*time) > beer_fit_fourier=lm(beer_monthly[,1]~poly(time,2)+sin.t+cos.t) #this is not > working gives me result without error > beer_fit_fourier=lm(beer_monthly[,1]~time+time2+sin.t+cos.t) #it is working > > > #prediction is not workinng > > tpred_four <- data.frame(time = seq(1995, 1998, length = 20)) > predict(beer_fit_fourier, newdata = tpred_four) > You'd rather read some documentation about lm and predict. You do not have variables sin.t and cos.t in your newdata. Please do read docs, posting guide and provide reproducible example. > Is there any way to fit first fourier frequency , > > Please assist. > > Thanks in advance > > > > > > -- > View this message in context: http://r.789695.n4.nabble.com/Help-me-with- > prediction-in-linear-model-tp2297313p2300991.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.
