Thanks David, I used you suggestion and it worked fine, please see below for what I did.
segplot(reorder(factor(genotype), genotype) ~ lower + upper On Nov 3, 2012, at 2:47 AM, David Winsemius wrote: > define genotype as a factor [[alternative HTML version deleted]] ______________________________________________ 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.