ref #2655 (PR#3566)

There is nothing here to reproduce!  Please do not use R-bugs for help 
requests (and please do use a meaningful subject line).  Also, R-bugs is 
not the place to report bugs (if you find one) in contributed packages, 
and stepAIC is in a contributed package (MASS).  You have not even told us 
the version of that package which you have used.  [All this is in the FAQ 
and in ?bug.report, so please read them. Especially since you did the 
same things with PR#2655.]

This is unlikely to be a bug, more likely a limitation of R's scope rules.
If you send a reproducible example to R-help you are likely to get help 
about how to attack your problem in R.

Full_Name: Melinda Teng
Version: 1.7.1
OS: Windows ME
Submission from: (NULL) (67.118.2.50)


Hi,

I understand that R 1.7.0 version (onwards) will solve the issue in #2655.
However, I still find the same error message. That is, a data matrix defined
outside the function containing the stepAIC() (alongwith glm()) is not passed
into the function. This data matrix is defined as one of the function
parameters.

Error in model.frame.default(formula = Y ~ X4, data = A, drop.unused.levels =
TRUE) : 
        Object "A" not found

In that usage A should be a data frame, not a matrix, BTW.

Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595