Indeed, I misread / misunderstood. I think it's a difficult concept that's hard to explain and the example wasn't great. But thanks all for straightening me out!
—
David Kulp

On Mon, Jun 24, 2013 at 6:44 PM, Duncan Murdoch <murdoch.duncan@gmail.com>
wrote:

> On 13-06-24 4:27 PM, David Kulp wrote:
>> According to http://cran.r-project.org/doc/contrib/Fox-Companion/appendix-scope.pdf and other examples online, I am to believe that R resolves variables using lexical scoping by following the frames up the call stack.
> You appear to have misread it.  Lexical scoping follows the chain of 
> environments where functions were defined.  It ignores the call stack.	
> Duncan Murdoch
>   However, that's not working for me.  For example, the following code, 
> taken from the reference above fails instead of returning 7.  What am I 
> doing wrong?  Thanks!
>>
>> f <- function(x) { a<-5; g(x) }
>> g <- function(y) { y + a }
>> f(2)
>> Error in g(x) : object 'a' not found
>>
>>
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>>
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>>
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