[Rd] plot ignores type= "n" when x is factor (PR#13703)

[pauljohn at ku.edu]

Full_Name: Paul E. Johnson
Version: 2.9.1
OS: Linux (Ubuntu 9.04)
Submission from: (NULL) (129.237.61.25)


x <- gl(2,50)
y <- rnorm(100)
plot(x,y)
plot(x,y, type="n")


I *wish* the last one would draw a blank plot box w/axes, but it does not. It
fills in the middle with a box plot. I've not seen this problem when x is
numeric.