On Feb 5, 2010, at 3:33 PM, li li wrote:

Dear all,
  I need to write the following function in R. Can anyone give me some
hint?
Thank you!  Please see the attachment for the function.
    Hannah
<question to R-heip.pdf>______________________________________________

A three argument function with two instances of sapply and the function choose should get you there pretty quickly.

--
David.


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David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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