Hi > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Antonio Silva > Sent: Tuesday, December 04, 2012 10:26 AM > To: R-help@r-project.org > Subject: [R] partial analisys of a time series > > Dear list members > > I want to analyze separately the months of a time series. In other > words, I want to plot and fit models for each month separately. > > Taking the example of > http://a-little-book-of-r-for-time- > series.readthedocs.org/en/latest/src/timeseries.html > > births <- scan("http://robjhyndman.com/tsdldata/data/nybirths.dat") > birthstimeseries <- ts(births, frequency=12, start=c(1946,1)) > birthstimeseries > plot.ts(birthstimeseries) > birthstimeseriesHW <- HoltWinters(birthstimeseries) > plot(birthstimeseriesHW) > > How to proceed the plotting and HoltWinters smoothing considereing only > Januarys, Februarys, etc. separately.
Split your data by months to a list, use lapply. using zoo package blist <-split(birthstimeseries, months(as.Date(birthstimeseries))) l.blist <- lapply(blist, HoltWinters) Regards Petr > > Thanks in advance. > > Antonio Olinto > > [[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.