[Rd] strange value in .Last.value

[Winston Chang]

This is the result of the withVisible() function, which is called by
source(). This should illustrate what it does:

> withVisible(1+1)
$value
[1] 2

$visible
[1] TRUE


> withVisible(invisible(1+1))
$value
[1] 2

$visible
[1] FALSE

-Winston

On Tue, Jun 4, 2013 at 3:25 PM, Andreas Leha
<andreas.leha at med.uni-goettingen.de> wrote:
> Hi all,
>
> the .Last.value sometimes contains a strange $visible FALSE value.  This
> poses problems when using R with ESS (and ess-developer-mode) from
> within org-mode.
>
>
> >From http://permalink.gmane.org/gmane.emacs.ess.general/7299:
>
> --8<---------------cut here---------------start------------->8---
> Here is how to reproduce. Put df <- data.frame(a=1:3, b=1:3) in test.R
> and then:
>
>    source("test.R")
>    print(.Last.value)
>
> you should get:
>
>    $value
>      a b
>    1 1 1
>    2 2 2
>    3 3 3
>
>    $visible
>    [1] FALSE
> --8<---------------cut here---------------end--------------->8---
>
>
> Regards,
> Andreas
>
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