(Oops first mistake was posting to the wrong area) I am not sure what is needed to be posted in terms of what I have done but will explain nonetheless.
I am using the msm.package and trying to specify my reference category for an outcome covariate. The following command line works: ## age of respondent - using year5a: categorical preg_fyear5a.msm<-msm(outcome~ipi, subject=id, data, qmatrix=crudemat, exacttimes=TRUE, covariates=~factor(year5a)) However, in the dataset (data) the reference category 0 is a moderately small cell, so I would like to change it to 1 which is much large. There are 5 categories in the covariates year5a (0,1,2,3,4). I have tried all sorts of approaches with 'ordered' and 'level' but no love. Cheers, Jase PS. Operating in Win XP on a fast machine! Jason Ferris Research Officer Australian Research Centre in Sex, Health and Society Level 1, 215 Franklin St Melbourne VIC 3000 P: 61 (0)3 9285 5282 F: 61 (0)3 9285 5220 ______________________________________________ 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.
