Many thanks once more for helping me to solve this. Gabor - I wasn't even aware of month.abb, so thanks for bringing this useful trick to my attention!
Steve _________________________________________________________________ [[elided Hotmail spam]] ______________________________________________ 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.
