[R] cex= and plot(), title(), mtext()

[Peter Perkins]

using R 1.2.1 under LinuxPPC, using the default X11 graphics device, i
can't get the cex= argument for plot() and title() to have any effect. 
works for text(), though.  the text size for plot() and title() _is_
correct if par(cex=size) is called first.  oddly, mtext() seems to pay
attention to cex=, but to ignore the value set by par().

for example, 

> plot(1:5, 1:5, main="Main", cex=2) # plots title/labels in std size
> mtext("mtext", side=1, at=1.5, line=1, cex=2) # large text here
>
> par(cex=2)
> plot(1:5, 1:5, main="Main") # large text now
> mtext("mtext", side=1, at=1.5, line=1) # but std size here

i don't find this problem in the either the archives or the bug list,
but i can't really believe that it's a bug and no one else has seen it
yet.  so perhaps i'm speaking R with an S accent? or doing something
else stupid?  help?

- peter
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