Dear John, Thanks a lot for the quick response and fix! I'm looking forward to try out the development version. I assume that the fix will be released in the official version at some point.
Thanks again, Gang On Tue, Jan 13, 2015 at 5:06 PM, John Fox <[email protected]> wrote: > Dear Gang, > > The problem was in the model.matrix.lme() method provided by the car > package, and is now fixed in the development version of the car package on > R-Forge. You should be able to install it from there via > install.packages("car", repos="http://R-Forge.R-project.org";) after the > package is next built on R-Forge, usually in a day or so. > > Best, > John > >> -----Original Message----- >> From: R-help [mailto:[email protected]] On Behalf Of Gang Chen >> Sent: January-13-15 1:48 PM >> To: r-help >> Subject: [R] Problem with Anova() in package "car" >> >> I'm having some trouble with Anova() in package "car". When the model >> formula is explicitly expressed: >> >> library('nlme') >> library('car') >> fm <- lme(distance ~ age + Sex, data = Orthodont, random = ~ 1) >> >> Anova() works fine: >> >> Anova(fm) >> >> However, if the model formula is scanned from an external source: >> >> myModel <- as.formula("distance ~ age + Sex") >> fm2 <- lme(myModel, data = Orthodont, random = ~ 1) >> >> I get the following error: >> >> Anova(fm2) >> Error: object of type 'symbol' is not subsettable >> >> How to resolve the situation when the model formula is defined externally? >> >> Thanks, >> Gang >> >> ______________________________________________ >> [email protected] 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. > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > ______________________________________________ [email protected] 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.
