[R] Make a box-whiskers plot in R with 5 variables, color coded.

[Martin Maechler]

   [............]	  

    > You are missing the closing bracket on the boxplot()
    > command.  Just finish with a ')'

Hmm... I once learned

 '()' =: parenthesis/es
 '[]' =: bracket(s)
 '{}' =: brace(s)

Of course, I'm not a native English speaker, and my teacher(s) /
teaching material may have been biased ... but, as all three
symbol pairs play an important role in R, I think it would be
really really helpful,  if we could agree on using the same
precise English here.

I'm happy to re-learn, but I'd really like to end up with three
different simple English words, if possible.
(Yes, I know and have seen/heard "curly braces", "round
 parentheses", ... but I'd hope we can do without the extra adjective.)

Thank you, well versed English (or "American") learned readers
of R-help, for wise guidance on this ...

Martin