Thanks Bert I've been through my variables again and have managed to get the code working - shouldn't have tried to deal with it at the end of the day yesterday!
all the best Lian -- View this message in context: http://r.789695.n4.nabble.com/Bayesian-estimate-of-prevalence-with-an-imperfect-test-tp4265595p4268526.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.