> On Dec 20, 2017, at 6:51 AM, Bond, Stephen <stephen.b...@cibc.com> wrote: > > Knowledgeable useRs, > > Please, advise how to use offset with a factor. I estimate monthly effects > from a much bigger data set as monthly effects seem to be stable, and other > variables are estimated from a small, but recent data set as there is > variation in those non-seasonal coefficients. > How can I use the seasonality estimates from the big data set as an offset > provided to the small data set. I know an offset is supposed to be > quantitative, but this is such a practical and sensible scenario, I feel > compelled. Assume I have 11 coefs estimated with contr.sum.
Why not create a variable that specifies the relevant coefficient for each of the various levels of the factor (and 0 for the reference level? Then pass that variable to the offset argument. -- David. > > Thanks everybody > > Stephen > > > [[alternative HTML version deleted]] Do note: Rhelp is a plain-text mailing list. > > ______________________________________________ > 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. David Winsemius Alameda, CA, USA 'Any technology distinguishable from magic is insufficiently advanced.' -Gehm's Corollary to Clarke's Third Law ______________________________________________ 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.
