[Rd] non-centrality parameter in pf() (PR#752)

[Peter Dalgaard BSA]

Peter Dalgaard BSA <p.dalgaard@biostat.ku.dk> writes:

> Heh. This one goes right back to AS R84 (1990). The whole business of
> calculating x0 like that is to avoid calculating a bunch of terms that
> are practically zero when the noncentrality parameter is zero, and the
                                                           ^^^^
Whoops. Read: "large"

> paper details what changes to the FORTRAN are needed to initialize the
> recurrence relation for successive terms in mid-sequence. However it
> forgets to say that the starting point for XJ also needs to be
> changed.... 

I have now committed a fix to appear in R v. 1.2

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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