On Apr 18, 2011, at 2:44 PM, Dimitri Liakhovitski wrote: > Hello! > > I am trying to create a formula object using as.formula. But it's not working: > > examplephraze<-"for.my.example" > myformula<-as.formula(paste(examplephraze,"~group, sum, data=mydata",sep="")) > > What's the problem? > Thanks a lot!
The actual 'formula' part consists *only* of the actual model specification formula (LHS ~ RHS), not the additional arguments to a model function or other function that takes a formula as an argument (eg. boxplot()). Thus: myformula <- as.formula(paste(examplephraze,"~group")) > myformula for.my.example ~ group HTH, Marc Schwartz ______________________________________________ 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.
