[R] Existence of an object

Margaret Donald merricks.merricks at gmail.com
Sat Nov 7 04:48:04 CET 2015

I have a variable meanedf which may sometimes not be defined due to a
complex set of circumstances.
I would like to be able to find out whether or not it exists, and then
branch appropriately in my code.

I had hoped to be able to use is.null() or exists() but neither of these
returns TRUE or FALSE which is the behaviour I would like, so that I can
write some appropriate branching code.

Error: object 'meanedf' not found
No suitable frames for recover()

Error in exists(meanedf) : object 'meanedf' not found

I would like some code which returns TRUE when meanedf exists and FALSE
when it doesn't.

Thanks, and regards,
Margaret Donald

Margaret Donald
Post Doctoral researcher
University of New South Wales
margaret.donald at unsw.edu.au
0405 834 550

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