Re: [R] Scoped options setting?

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Thu, 17 May 2007 08:01:34 +0100 (BST)

?on.exit

But here, you want suppressWarnings.

On Wed, 16 May 2007, Zack Weinberg wrote:

> Is there any way to set options during the evaluation of a particular
> expression, with them automatically reset when control leaves that
> expression, however that happens? Kind of like "let" on a "special"
> variable does in Lisp. I naively tried
>
> with(options(warn=-1), {
> fit <- fitdistr(data, 'weibull') # complains about NaNs
> })
>
> but this leaves options('warn') set to -1 afterward. I can save and
> restore the value explicitly, but then if fitdistr() throws an error,
> it won't get reset...

-- 
Brian D. Ripley,                  ripley_at_stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Thu 17 May 2007 - 07:28:30 GMT

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