export figure by pdf command

I was going to attempt to answer your question, but I refuse to
respond to anyone who writes "wanna" when they mean "want to".
The use of "wanna" is unacceptable in written English unless you
are *trying* to be funny, and I don't think you are.

     cheers,

         Rolf Turner

Dear R mailing listers,


After plotting, I wanna save it as file in pdf format using pdf("name.pdf")
command. It failed, but I can do it by GUI operation (file-save as-pdf).

e.g.

x11()
hist(x, breaks = 50, probability = FALSE)
pdf("hist.pdf")