The short answer is that you're trying to make a categorical interaction out of continuous variables, so that the resulting factors i2 and i3 have 1050 and 7200 levels respectively. (Note to people trying to reproduce this example: you'll need library(emdbook); library(bbmle); data(Lily_sum) ...) It'll take me a little longer to come up with a more satisfactory answer, but the bottom line is that interactions in a continuous context are generally *products* rather than all combinations of levels ...
alexander russell-2 wrote: > > Hello, > > After putting together interaction code that worked for a single pair of > interactions, when I try to evaluate two pairs of interactions( > flowers*gopher, flowers*rockiness) my computer runs out of memory, and the > larger desktop I use just doesn't go anywhere after about 20 minutes. > > Is it really that big a calculation? > > to start: > > mle2(minuslogl = Lily_sum$seedlings ~ dnbinom(mu = a, size = k), > > start = list(a = 10, k = 1)) > then: > i2<-interaction(Lily_sum$flowers, Lily_sum$gopher) > > i3<-interaction(Lily_sum$flowers, Lily_sum$rockiness) > > mle2(Lily_sum$seedlings ~ dnbinom(mu = a, size = k), start=list(a=10,k=1) > ,parameters=list(a~i3+i2+Lily_sum$flowers)) > > (the last run leads to a stalled calculation) > > regards, > > R > > [[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. > > -- View this message in context: http://www.nabble.com/interactions-and-stall-or-memory-shortage-tp25221662p25240372.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
