[R] Declaring variables in R

[Gabor Grothendieck]

See findGlobals in the codetools package.

On 10/19/07, Moshe Olshansky <m_olshansky at yahoo.com> wrote:
> Please forgive me if my question is answered in Help
> FAQ no. 23481739...
>
> In language like C every variable must be declared
> before it can be used.
> In VBA, if a variable has not been declared it is
> assumed to be of a special type (Variant).
> In R (and Matlab) variables do not have to be
> declared. This is convenient, but in a large program
> one can make a typo which will be extremely difficult
> to find.
> 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?
>
> Thank you.
>
> Moshe.
>
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