[R] commenting out a block of R code

[Ranjan Maitra]

Hi Joshua and Don,

Thanks very much! 

I guess I can now see why one could do that using the editor, but I
like Joshua's hack suggestion. I did not think about it:-(


Best wishes,
Ranjan

On Sun, 6 May 2012 19:41:01 -0700 Joshua Wiley <jwiley.psych at gmail.com>
wrote:

> Hi Ranjan,
> 
> To me, this is really a text editors job.  Feature-rich editors make
> it trivial, for example in Emacs, you can select a region (whatever
> size you want) and M-x comment-region automatically comments every
> line in that region.  Similarly M-x uncomment-region will uncomment
> every line.  If you were doing this all the time, you could bind some
> keyseries to do it for you.  Vim has something similar, though I
> forget the exact command.
> 
> A hack is:
> 
> if (FALSE) {
> all the lines
> you want
> to be `commented'
> }
> 
> which will leave them unevaluated at least.  Both of these have been
> suggested before on the list, which is probably why Brian Ripley
> suggested searching the archives.
> 
> Cheers,
> 
> Josh
> 
> 
> On Sun, May 6, 2012 at 7:31 PM, Ranjan Maitra <maitra at iastate.edu> wrote:
> > Dear friends,
> >
> > Is there an easy way of commenting out a block of R code after it has
> > been written? (I am aware that R-aware editors can insert #
> > line-by-line while it is being written, but I want to basically block
> > out chunks of R code in a few strokes.)
> >
> > This question was asked on this mailing list some time ago: Professor
> > Ripley's answer was to try the following:
> >
> > RSiteSearch(string="comment multiple lines")
> >
> > Perfectly fine, but inexplicably, I got searches back (seven
> > pages) which do not seem to have any connection with what I am looking
> > for.
> >
> > Is there an easy way of doing this?
> >
> > Many thanks and best wishes,
> > Ranjan
> >
> > ______________________________________________
> > R-help at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> 
> 
> 
> -- 
> Joshua Wiley
> Ph.D. Student, Health Psychology
> Programmer Analyst II, Statistical Consulting Group
> University of California, Los Angeles
> https://joshuawiley.com/
>