Might it be feasible to add, "See Also: missing" to the help
page for "exists"?
Currently, one can spend hours studying the help page for
"exists" without getting a clue to the answer to the post copied below.
Thanks,
Spencer
On 5/14/2011 3:30 AM, David Winsemius wrote:
On May 14, 2011, at 3:30 AM, utkarshsinghal wrote:
Hi all,
I want to define a function such that one of its argument if passed
do one
thing and if not passed do the second thing.
?missing
So basically, I have to check
whether the argument is passed or not inside the function. I am
trying to
use 'exists' function to do this.
f = function(a,b){exists("b")}
f(a=3, b=4)
[1] TRUE
This is working as expected.
But if I do the following:
f(a=3)
[1] TRUE
Can anybody explain why this function is returning TRUE here.
--
Many thanks,
Utkarsh
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PLEASE do read the posting guide
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and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
______________________________________________
r-h...@r-project.org mailing list
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PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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