On Fri, Jan 14, 2011 at 07:58:07PM +1000, bgr...@dyson.brisnet.org.au wrote: > > Thanks for your e-mail. The data was a report derived from a statewide > database, saved in EXCEL format, so the usual issue of the vagaries of > human data entry variation wasn't the issue as the data was an automated > report, which is run every three months.
If this problem occurs with computer generated data, it may also be worthwhile to talk to whoever is in charge of that reporting system and hope to get the bug fixed. And just to add one of my favorite inital checks: I always double check if the number of levels of each factor in my data.frame seems to make sense. cu Philipp -- Dr. Philipp Pagel Lehrstuhl für Genomorientierte Bioinformatik Technische Universität München Wissenschaftszentrum Weihenstephan Maximus-von-Imhof-Forum 3 85354 Freising, Germany http://webclu.bio.wzw.tum.de/~pagel/ ______________________________________________ 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.