Dear David, An addendum: Looking at my original posting, I see that failing to specify a list as the xlevels argument was my error.
Sorry, John > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of David > J. Netherway > Sent: Wednesday, June 09, 2004 8:27 PM > To: [EMAIL PROTECTED] > Subject: Re: [R] Specifying xlevels in effects library > > Andy and John, > > I looked at typical when xlevels did not work but when I saw > that it was a function I went no further. Setting the > function to a constant was a good idea. > John's method seems to require that I change the model: > > > eff <-effect("sex*age",mod,xlevel=(Age=c(120,120))) > Error in all(!(factors[, term1] & (!factors[, term2]))) : > subscript out of bounds > In addition: Warning message: > sex:age does not appear in the model in: effect("sex*age", > mod, xlevel = (age = c(120, 120))) > > Andy's method works as suggested for this simple case. > > Thanks for your time. > > Cheers, David > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
