[R] Testing for existence of object within a function

[Gabor Grothendieck]

On Fri, Oct 8, 2010 at 4:05 PM, Eli Holmes <e2holmes at gmail.com> wrote:
> I'm still trying to sort out if I can tell the function not to use
> values in the user workspace if they don't exist locally in a
> function, i.e. a "use local variables only" option when defining a
> function. Obviously, I could go to a style of programming where
> I define all local function variables at the top of my function and
> set them, somehow, to a value that will crash the code if I forget to
> reset them later in the function, but it would be easier if I could
> tell the function not to look for variables in the user workspace.

See the discussion in the February 27, 2010 news item on the proto home page:
http://r-proto.googlecode.com


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