[Rd] Evaluation puzzle
therneau at mayo.edu
Fri Nov 12 00:08:51 CET 2010
The answer came from Gabor -- the model.frame function has a
non-standard evaluation, in that it uses the enviromnent attached to the
formula as the "enclosure" for looking up variable names.
This is clearly documented and I somehow missed it when reading the
page. So "reading deficit" is the true root of my query. I scratched
my head for a couple of hours before sending for help.
Also a typo in my stripped down example -- I forgot the as.formula()
wrapper which is in the actual survexp function. This added a red
herring to the discussion.
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