On Apr 21, 2012, at 9:49 AM, Martin Renner wrote: > When plotting a numerical vector against a factor, 'type="n"' seems to have > no affect, e.g. >> plot (1:10~factor (1:10), type = "n") > > looks just like >> plot (1:10~factor (1:10)) > > Plotting a numerical against itself works as expected: >> plot (1:10, type = "n") > > I see the same behavior under debian gnu/linux, Mac OS X, and Win7 (all > current versions, see below). Is this a bug? > > Regards, > Martin
This has to do with method dispatch. See ?plot.formula, which is the plot method called you pass a formula, as opposed to passing a vector as in your third example. In this case, ?plot.factor is called when the 'x' part of the formula (RHS) is a factor. When plot.factor is called, it internally calls ?boxplot and of course, there is no "type = 'n'" for boxplots, hence it is ignored. Regards, Marc Schwartz ______________________________________________ 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.
