[R] get: problem with environments
tlumley at uw.edu
Thu Oct 11 00:52:14 CEST 2012
On Thu, Oct 11, 2012 at 11:18 AM, R. Michael Weylandt
<michael.weylandt at gmail.com> wrote:
> Thanks Prof Lumley,
> I'm still not sure how this gets to the call stack of 5 or 6 the OP
> reported or the difference between GUI & Terminal. Any thoughts there?
I don't see how the terminal version is getting 5 and 6 rather than 1
and 2, but my testfun2() lets the OP do what he was originally trying
The difference between testfun() and print(testfun()) (ie, 1 vs 2, or
5 vs 6) is because of lazy evaluation: in print(testfun()), testfun()
is called from inside print() when it needs the value to do method
I can't reproduce the value of 5, so I can't help much. For anyone
wanting to experiment further, it would probably be simpler to use
rather than looking at whether a variable is found or not. I can't
see how testfun() typed at the global command prompt can return
anything other than 1, but maybe something is getting in between the
console and the evaluator. For example:
 " 6"
I don't see why a pure console program should do this on Linux, though.
Professor of Biostatistics
University of Auckland
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