[R] ggplot: order of numeric factor levels?
mpromber at psych.upenn.edu
Wed Apr 1 00:01:43 CEST 2009
I'm having problems with qplot and the order of numeric factor levels.
Factors with numeric levels show up in the order in which they appear
in the data, not in the order of the levels (as far as I understand
Here is a minimal example:
y <- c(-1,2,0,0,-2,-1)
z <- factor(y,levels=c(-2,-1,0,1,2))
For me, the resulting plot is ordered: -1,2,0,-2
plot(z) is neatly ordered -2,-1,0,1,2
What am I not getting?
Thanks for any pointers,
More information about the R-help