tmp.out.sort <- tmp.out[, order(names(tmp.out))] tmp.out.sort <- tmp.out[, order(names(tmp.out)), drop=FALSE]
>From your description of misbehavior with a single column, I think the drop=FALSE argument will provide the protection you need. Then you will not need the if clause. See ?`[.data.frame` for the story and examples. Rich ______________________________________________ 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.