[R] Smart detection of wrap width?

[Ista Zahn]

For ESS see https://github.com/gaborcsardi/dot-emacs/blob/master/.emacs

Best,
Ista

On Apr 17, 2015 7:37 PM, "Paul Domaskis" <paul.domaskis at gmail.com> wrote:
>
> Yes, I found the width option in the help pages, but I was wondering
> if there was automatic setting of the wrapping according to the
> current window width.
>
> Your function works exactly as I wished.  I'll probably get smarter
> with time (I hope) but would it be reasonably good practice to stick
> this into ~/.Rprofile?  I don't suppose there is a way to have it
> automatically invoked when the window size/positition changes?  (It's
> still priceless even without automatic triggering).
>
> On Fri, Apr 17, 2015 at 7:20 PM, MacQueen, Don <macqueen1 at llnl.gov>
> wrote:
> > A lot of this depends on what context you are running R in, e.g.,
> > Windows console, Mac console, or command line in a unix-alike. Or
> > within ESS in emacs. Those are different interfaces supported by, to
> > some extent, different people, and are based on the underlying
> > capabilities provided by the operating system.
> >
> > Have you yet encountered
> >   options()$width
> > ?
> > For example,
> >   options(width=100)
> > will cause wrapping at 100, at least for certain kinds of output.
> >
> > In an xterm shell running in an X windows context, I frequently use
> >
> > setwid <- function ()
> > {
> >     if (!interactive())
> >         return(invisible(NULL))
> >     scon <- pipe("stty -a")
> >     stty <- scan(scon, what = "", sep = ";", quiet = T)
> >     close(scon)
> >     cstr <- stty[grep("columns", stty)]
> >     options(width = as.numeric(gsub("[^0-9]", "", cstr, ignore.case = T)))
> >     paste("width =", options()$width, "\n")
> > }
> >
> > A function I wrote that resets the width option to match the window
> > widths, and therefore adjusts the wrapping after I resize a windwo.
>
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