There is also a package imputeTS, which may be able to do what you want. It has a nice Introduction vignette and also appears to have nice plot functions
Berend Hasselman > On 24 Mar 2017, at 02:11, David Winsemius <dwinsem...@comcast.net> wrote: > > There's also an irts-package "irregular time series" > > Sent from my iPhone > >> On Mar 23, 2017, at 3:42 PM, John C Frain <fra...@gmail.com> wrote: >> >> Google "arima missing data r" will bring up several references including >> http://stats.stackexchange.com/questions/104565/how-to-use-auto-arima-to-impute-missing-values. >> There are several other useful results in that search. >> >> John C Frain >> 3 Aranleigh Park >> Rathfarnham >> Dublin 14 >> Ireland >> www.tcd.ie/Economics/staff/frainj/home.html >> mailto:fra...@tcd.ie >> mailto:fra...@gmail.com >> >>> On 23 March 2017 at 15:42, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: >>> >>> Even the most basic introduction to R discusses the use of NA for missing >>> data. Injecting values that could be mistaken for actual readings is a >>> dangerous approach. You can use the merge function to introduce missing >>> rows into zoo objects or data frames. >>> -- >>> Sent from my phone. Please excuse my brevity. >>> >>> On March 23, 2017 8:22:47 AM PDT, Paul Bernal <paulberna...@gmail.com> >>> wrote: >>>> Dear all, >>>> >>>> Hope you are doing well. I am trying to model the historical number of >>>> transits of a particular market segment, but the problem is that I have >>>> missing data. >>>> >>>> I am working with monthly data, so I have 12 observations per year (in >>>> general). The problem is that, when I bring the data from the database, >>>> the >>>> following happens, for example: >>>> >>>> January-2000, Feb-2000, Apr-2000, Jun 2000 (I have missing >>>> observations) >>>> >>>> when I am supposed to have the sequence January-2000, Feb-2000, >>>> Mar-2000, >>>> Apr-2000, May-2000, Jun-2000, etc. >>>> >>>> How can I model a time series when there are missing months? I was >>>> planning >>>> making up fictional or fake observations with a value of 1 to fill in >>>> the >>>> gaps but not sure if this is a reasonable approach. >>>> >>>> Any help and/or guidance will be greatly appreciated, >>>> >>>> Best regards, >>>> >>>> Paul >>>> >>>> [[alternative HTML version deleted]] >>>> >>>> ______________________________________________ >>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>>> 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 -- To UNSUBSCRIBE and more, see >>> 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. >>> >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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 -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
