R help - Sep 2010 - getting a function to do something

Hi,

I want to repeatedly do a task, so thought I could put it in a function and
then just call the function.
The task is just clearing all the graphics devices and then opening a new
one of a specified size.

Now, when I call the function below, nothing appears to happen. But when I
run the 2 lines in the function on there own, I get what I want.

Please can someone explain to me what is the obvious thing I am missing?

 clearG <- function() {
 graphics.off()
 windows(13,8)
}


#nothing happens (as far as I can tell)
clearG

#but this works, but I want to just type 1 line rather than several
 graphics.off()
 windows(13,8)




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as, silly me.

clearG() 

this now works!


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