Dear Mr. Brian, What is the ISO 8601 standard for dates?
Excuse my ignorance and best regards, Paul El 09/09/2013 16:41, "Prof Brian Ripley" <rip...@stats.ox.ac.uk> escribió: > On 09/09/2013 20:36, Paul Bernal wrote: > >> Hello everyone, >> >> I was trying to fit an arima model to a daily historical data, but, for >> some reason, havent been able to. >> >> I basically have 212 observations (from 12/1/2012 to 06/30/2013) >> containing >> > > Those dates are not in a standard format: ISO 8601 is preferred. > > the number of transits for a particular vessel. >> > > Which seems to be less than a year and you are trying to fit a seasonally > differenced model with period 365. So I guess there are no pairs of > observations a year apart. > > This is not really an R issue: you need to get basic advice on time-series > modelling. > > The following messages are produced by R: >> >> dailytrans.fit<-arima(**dailytrans$transits, order=c(0,1,2), >> seasonal=list(order=c(0,1,2), period=365), include.mean=FALSE) >> Error in arima(dailytrans$transits, order = c(0, 1, 2), seasonal = >> list(order = c(0, : >> too few non-missing observations >> >>> dailytrans.fit<-arima(**dailytrans$transits, order=c(0,1,2), >>> >> seasonal=list(order=c(0,1,2), period=200), include.mean=FALSE) >> Error in makeARIMA(trarma[[1]], trarma[[2]], Delta, kappa) : >> maximum supported lag is 350 >> >> Then I tried the auto.arima function but the following happened: >> > > Which is not part of R. > > fit<-auto.arima(dailytrans$**transits) >> >> Warning in if (class(fit) != "try-error") offset <- -2 * fit$loglik - >> length(x) * : >> >> the condition has length > 1 and only the first element will be used >> >> If anyone could give me some guidance I will really truly appreciate it, >> >> >> Best regards, >> >> >> Paul >> > > > > -- > Brian D. Ripley, rip...@stats.ox.ac.uk > Professor of Applied Statistics, > http://www.stats.ox.ac.uk/~**ripley/<http://www.stats.ox.ac.uk/~ripley/> > University of Oxford, Tel: +44 1865 272861 (self) > 1 South Parks Road, +44 1865 272866 (PA) > Oxford OX1 3TG, UK Fax: +44 1865 272595 > > ______________________________**________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide http://www.R-project.org/** > posting-guide.html <http://www.R-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]]
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