I am brand new to the Mac, and wondered what exactly X11, does.

The faq says it is optional, but equally, it seems important enough for it
to have an icon in the r-Console.

Having been using R in Windows, X11 is a completely new concept to me and
wondered if someone could explain its purpose.

I understand roughly what it is from googling, but can't make the link with
it purpose in R on the Mac.

Many thanks,

Graham

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