Re: [Rd] How to build a list with missing values? What is missing, anyway?

From: Thomas Lumley <>
Date: Mon, 08 Oct 2012 08:54:54 +1300

On Fri, Oct 5, 2012 at 4:07 PM, Bert Gunter <> wrote:
> On Thu, Oct 4, 2012 at 6:31 PM, Peter Meilstrup

>> explain some things, such as under what circumstances one would get a
>> "`...` used in incorrect context" error.
> How could it possibly know that?
> -- Bert

By looking at the code that throws the error.

The code is in src/main/eval.c, and the error is thrown in several places when the symbol ... appears in a call being evaluated, and the value of the symbol is neither the special DOTSXP type nor NULL. That is, if you use ... in code and there isn't a ... formal argument in scope.


Thomas Lumley
Professor of Biostatistics
University of Auckland

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