[R] Scoped options setting?

From: Zack Weinberg <zack_at_cogsci.ucsd.edu>
Date: Wed, 16 May 2007 23:18:30 -0700


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...

zw



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