Sudden "unused argument" error

Question

I have no idea why but I am quite sure the following did produce a plot a while back. Can you tell me what's wrong here?

library(ggplot2)
qplot(c(0, 2), stat="function", fun=exp, geom="line") 

This returns "Error in c(0, 2) : unused argument (2)." Why?

Edit: This is a general problem:

a <- c(0, 2)

gives the same error. What's going on here?

Answer 1

Works for me with ggplot2 v 0.9.3.1. Based on your edit, I'm 99% sure you have a different c() function defined in your workspace/loaded somewhere in your search path (getAnywhere("c")$where), which is masking the built-in version.

To test, try starting from a clean session (with --vanilla if possible to skip reloading workspace/executing .Rprofile/etc.)

If you're lucky the problem is in your global workspace and rm("c") will work -- otherwise you have to track down which package is loading this booby trap ... (find("c") could be useful in that case ...)