[R] Drawing Trig Function

[Ko-Kang Wang]

Just out of curiousity, why is it I can't do multiple commenting in R.  I have
to type # in front of each line (well, it's true).  If there are 20 or more
lines it becomes a bit annoying.

In SAS there is /* blah blah blah */, which comments out an entire block.
Java and C++ have the similar feature too.  Will it be possible to put this
feature in R in the future?

Just some personal opinions,

Ko-Kang

Peter Dalgaard BSA wrote:

> Ben Bolker <ben at zoo.ufl.edu> writes:
>
> > if (FALSE) {}
> >
> > around the stuff you want to comment out.
> > This won't work if you have open parentheses or other "syntax errors" in
> > the commented region.
>
> ..and if you use it to remove largish blocks in scripts fed to stdin,
> you'll notice that it takes quit a lot of time. This is due to a
> current silliness in the R parser: Whenever we see a newline, we check
> whether the expression is complete. If so, then we evaluate it,
> otherwise we *reparse* what has already been seen, adding another
> line. This makes parsing O(k^2) in the number of lines in an
> expression which is really unnecessary. It's just that noone has
> figured out how to do the required checkpointing of the bison/yacc
> parser yet. The effect doesn't happen when you source() files, because
> in that case we always parse the entire file before executing it.
>
> --
>    O__  ---- Peter Dalgaard             Blegdamsvej 3
>   c/ /'_ --- Dept. of Biostatistics     2200 Cph. N
>  (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
> ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

--
-----------------------------------------------------------------------------------

 Ko-Kang Wang
 Undergraduate Student
 Computer Science/Statistics Double Major
 University of Auckland
 Auckland 1005
 New Zealand
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