Dear r-help,
I am looking for additional documentation on the "adj" column in
rpart's
splits matrix. The help says:
adj
gives the adjusted concordance for surrogate splits
I am looking info about "adjusted concordance". I cannot find this
phrase
in either Therneau & Atkinson original RPART documentation or the CART
book.
This question came up in the context of trying to calculate what the
"improve" for the node would have been if surrogate split were used
instead. So if anybody knows how to do (or extract) that would be very
helpful too.
Thanks in advance,
Clayton Springer
--
Clayton Springer, Ph. D.
Sandia National Laboratories csprin at ca.sandia.gov
Biosystems Research Department (925) 294-2143
P.O. Box 969, MS 9951 fax: (925) 294-3020
Livermore, CA, 94551-0969
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