[R] Declaring variables in R
tlumley at u.washington.edu
Fri Oct 19 17:52:50 CEST 2007
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
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 Lumley Assoc. Professor, Biostatistics
tlumley at u.washington.edu University of Washington, Seattle
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