R help - Jun 2011 - Plotting from functions

I can plot to png's fine when i run this directly from the top-level
script/console:

png('diamonds.png');qplot(carat,price,data=diamonds);dev.off()

But for some reason it's not working when that's in a function:

(function(){png('diamonds.png');qplot(carat,price,data=diamonds);dev.off()})()

I suspect this is because the qplot's return value must be
"returned"
to the top-level, because this works:

(function(){png('diamonds.png');qplot(carat,price,data=diamonds)})();dev.off()

Any hints on how I can plot from within a function?  Thanks in advance.

On Wed, Jun 1, 2011 at 1:04 PM, Yang Zhang <yanghatespam at gmail.com>
wrote:
> I can plot to png's fine when i run this directly from the top-level
> script/console:
>
> png('diamonds.png');qplot(carat,price,data=diamonds);dev.off()
>
> But for some reason it's not working when that's in a function:
>
>
(function(){png('diamonds.png');qplot(carat,price,data=diamonds);dev.off()})()
>
> I suspect this is because the qplot's return value must be
"returned"
> to the top-level, because this works:
>
>
(function(){png('diamonds.png');qplot(carat,price,data=diamonds)})();dev.off()
>
> Any hints on how I can plot from within a function? ?Thanks in advance.
>
Actually, just found that things work if I do:

print(qplot(...))

Is this just what you need to do to plot from within functions?