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. Thanks everybody Stephen [[alternative HTML version deleted]]
The documentation for ?offset states that you can have more than one offset. Michael On 20/12/2017 14:51, Bond, Stephen 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. > > Thanks everybody > > Stephen > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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. >-- Michael http://www.dewey.myzen.co.uk/home.html
> On Dec 20, 2017, at 6:51 AM, Bond, Stephen <Stephen.Bond at 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 at 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