Thank you so much for the suggestion. I want to estimate interactions between "the attributes of the choice set" and "subject-specific data (e.g., gender or income)". However, y ~ x | z notation is to see the interaction between "the alternatives of choice set" and "subject-specific data (e.g., gender or income)".
Therefore, I need to put the interaction terms after terms suggesting attributes. Any suggestions would be grateful. Kaz 2012/6/8 Achim Zeileis <achim.zeil...@uibk.ac.at> > On Fri, 8 Jun 2012, Kazu Nada wrote: > > Hi, I need help to do "mlogit" including "l( ) function. >> When I put following command, >> "Error in parse(text = x) : <text>:2:0:" is shown. >> > > (1) Your example is not reproducible for us, see the footer of this mail > and follow the posting guide. > > (2) You manually set up a lot of interaction terms which actually can be > seen as alternative-specific variables. You can simplify your formula > considerably if you use mlogit's y ~ x | z notation. See the two package > vignettes for guidance: vignette(package = "mlogit") > > -------- >> res1<-(mlogit(choice~train+**bus+plane+taxi+year+cost >> +I(gen*train)+I(gen*bus)+I(**gen*plane)+I(gen*taxi)+I(gen*** >> year)+I(gen*cost) >> +I(age*train)+I(age*bus)+I(**age*plane)+I(age*taxi)+I(age*** >> year)+I(age*cost) >> +I(prep*train)+I(prep*bus)+I(**prep*plane)+I(prep*taxi)+I(** >> prep*year)+I(prep*cost) >> +I(inc*train)+I(inc*bus)+I(**inc*plane)+I(inc*taxi)+I(inc*** >> year)+I(inc*cost) >> +I(tour*train)+I(tour*bus)+I(**tour*plane)+I(tour*taxi)+I(** >> tour*year)+I(tour*cost) >> +I(ecot*train)+I(ecot*bus)+I(**ecot*plane)+I(ecot*taxi)+I(** >> ecot*year)+I(ecot*cost) >> +I(kibo*train)+I(kibo*bus)+I(**kibo*plane)+I(kibo*taxi)+I(** >> kibo*year)+I(kibo*cost) >> ,data=dat)) >> -------- >> >> I appreciate if you could provide me any suggestion. >> >> Thank you. >> Kaz >> >> [[alternative HTML version deleted]] >> >> ______________________________**________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> >> PLEASE do read the posting guide http://www.R-project.org/** >> posting-guide.html <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 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.
