Hi, Thanks, although I dont think it was the Date.Time variable that was the problem because my x variable was Month.Year.
I realise now that this month variable was a factor and I changed the order of the factor using the following : fish$MonthYr<-factor(fish$MOYR,levels=c("05,2010","06,2010","07,2010","08,2010","09,2010","10,2010","11,2010","12,2010","01,2011","02,2011","03,2011","04,2011")) This seems to have ordered my x axis (factors)in the correct fashion. Thanks again for your help Phil -- View this message in context: http://r.789695.n4.nabble.com/ggplot2-month-and-year-boxplot-x-axis-order-problem-tp3623029p3624680.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.