Hi, I have a fairly elementary problem that I am unable to figure out. I have a continuous variable, Y, repeatedly measured at multiple times, T. The variable T is however is coded as a factor variable having these levels: c("Presurgery", "Day 30", "Day 60", "Day 180", "Day 365"). When I plot the boxplot, e.g., boxplot(Y ~ T), it displays the boxes in this order: c("Day 180", "Day 30", "Day 365", "Day 60", "Presurgery"). Is there a way to control the order of the boxes such that they are plotted in a particular order that I want, for example: c("Presurgery", "Day 30", "Day 60", "Day 180", "Day 365")?
More generally, is there a simple way to redefine the ordering of the categorical variable such that this ordering will be used in whatever operation is done? I looked at relevel, reorder, etc., but they did not seem to be applicable to my problem. Thanks for any help. Best, Ravi [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.