We might be miscommunicating! Or if not, sorry if I didn't understand what you said in reply.
What I was trying to say is: how about extending your blog post with one line to show people how to make the boxplot appear in their terminal as soon as they run the command? (I think at the moment it's going to appear as a PDF file named Rplots.pdf in the current directory, right?)
This is correct. A good cross platform tool for rendering images in many modern terminal emulators is imgcat[1]. iTerm2 appears to use this under the hood.
What I was trying to say is: how about extending your blog post with one line to show people how to make the boxplot appear in their terminal as soon as they run the command? (I think at the moment it's going to appear as a PDF file named Rplots.pdf in the current directory, right?)