Hi! I have the following problem that I beleive is a bug:
I have a dataframe with one categorical and one numerical vector. The categorical vector has three levels (uc, up and vc). A plot of the vectors with the categorical vector on the x-axis gives a boxplot with three boxes - exactly as expected.
If I then use the subset function to make a dataset that only includes two of the levels of the categorical vector and do the plot again, all three levels are still shown on the x-axis even though one of them doesn't exist in the dataset. The plot shows correct number of boxes (2).
The whole syntax for what I describe is as follows: exploration.df <- read.table('clipboard', header=T) attach(exploration.df) plot(treatment,total.escapes) exp.df <- subset(exploration.df, treatment!='up') attach(exp.df) plot(treatment, total.escapes) I use R version 2.9.1 (2009-06-26) for Debian. Knut Helge Jensen
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