[R] Variable Scope

[Duncan Murdoch]

On 4/12/2006 5:49 AM, James Kirkby wrote:
> Hi,
> 
> I was wondering if there is a way to stop R looking outside the scope of 
> a function, if it can't find the variable inside the function.
> 
> I seem to waste hours debugging functions only to find I've used a wrong 
> variable name somewhere, but the function still works because the 
> variable exists higher up the hierachy. It seems it would be easier to 
> debug if the function just went splat when it couldn't find the variable.

You don't want to do this, because very little in R is built-in to the 
language, many things (e.g. "+", "if", etc.) are functions stored in 
some environment outside your function.

Duncan Murdoch