[R] Modeling Time Series with Missing Observations

Jeff Newmiller jdnewmil at dcn.davis.ca.us
Thu Mar 23 16:42:52 CET 2017

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 <paulbernal07 at 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,
>following happens, for example:
>January-2000, Feb-2000, Apr-2000, Jun 2000 (I have missing
>when I am supposed to have the sequence January-2000, Feb-2000,
>Apr-2000, May-2000, Jun-2000, etc.
>How can I model a time series when there are missing months? I was
>making up fictional or fake observations with a value of 1 to fill in
>gaps but not sure if this is a reasonable approach.
>Any help and/or guidance will be greatly appreciated,
>Best regards,
>	[[alternative HTML version deleted]]
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