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1997 Apr 30
2
R-alpha: New Incomplete Beta Function
Here is a drop-in replacement for the R incomplete beta function.
src/math/pbeta.c
It is a slightly modified version of the cephes library one from
Netlib. In the few cases I tried it seems to give at least 14
digit agreement with the one in S-PLUS (its hard to get more).
I'm not sure what performance is like. I'd like to know if it
helps with some of the problems which have been