[ESS] Graphics in emacs window: how to copy R screen devices in non-interactive sessions (remotes)

Yihui Xie xie at yihui.name
Tue Nov 19 04:05:13 CET 2013

Yes. That seems to be very inefficient at the first sight, but at the
moment there is no way of knowing whether the current device has been
updated. In evaluate, we recordPlot() after each expression, and
compare it with the last recorded plot; if they are identical, we
discard the current one.

Yihui Xie <xieyihui at gmail.com>
Web: http://yihui.name
Department of Statistics, Iowa State University
2215 Snedecor Hall, Ames, IA

On Mon, Nov 18, 2013 at 8:50 PM, Vitalie Spinu <spinuvit at gmail.com> wrote:
>  >>> Yihui Xie on Mon, 18 Nov 2013 20:27:53 -0600 wrote:
>  > Evaluate captures plots after each R expression,
> Does that mean that you capture the same plot multiple times if a
> sub-expression didn't generate any graphic output?
> I will look into it, it might be a way to go, though it feels like a
> very heavy interference with the user input. Moreover, the input must be
> a syntactically valid expression, and this is often not the case with
> ESS. R debugger will probably not work, or will it?
>   Vitalie

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