[R] setting options only inside functions

[Uwe Ligges]

On 27.04.2011 15:16, Jannis wrote:
> Dear list members,
>
>
> is it possible to set some options only inside a function so that the original options are restored once the function is finished or aborted due to an error?  Until now I do something like:
>
>
> dummy=function()
> {
>    old.options=options(error=dummy1())
>
>    ....
>
>    options(old.options)
> }
>
>
> This works for most cases but when the function terminates because of an error and its last command is not run, error=dummy1() still remains as an option. Is there any way around this?
>

See ?on.exit:

  dummy <- function()
  {
     old.options <- options(error=dummy1())
     on.exit(options(old.options))


     ....


  }

Uwe Ligges



>
> Cheers
> Jannis
>
>
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