On Thu, 18 Oct 2007, Moshe Olshansky wrote:
> Please forgive me if my question is answered in Help
> FAQ no. 23481739...
If it were, we might well not forgive you -- the faq isn't *that* long. But it
isn't.
> In VBA one can use a special statement (Option
> Explicit) which does not allow using variables which
> have not been previously declared. As far as I
> remember this can also be done in Matlab (or at least
> there is a utility which can check whether your
> program uses undeclared variables).
>
> My question is: does such an option/utility exist in
> R?
>
The codetools package provides a tool that scans your code for undeclared
variables. It is not perfect --- it has occasional false positives and false
negatives -- but it is pretty good.
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
[EMAIL PROTECTED] University of Washington, Seattle
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