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ifelse problem - bug or operator error

Hi Michael,

No, I never use attach(), exactly for the reasons you state.  To do
due diligence I did a search of code for the function and it didn't
come up (I would have been shocked because I never us it!).

Now that real data is up, does your suggestion still apply?  I am
reading it now.

Thanks,

Jen

On Fri, Aug 24, 2012 at 5:38 PM, R. Michael Weylandt
<michael.weylandt at gmail.com> wrote: