From p.dalgaard@biostat.ku.dk  Tue Dec  5 15:01:09 2000
From: p.dalgaard@biostat.ku.dk (Peter Dalgaard BSA)
Date: 05 Dec 2000 16:01:09 +0100
Subject: [Rd] non-centrality parameter in pf() (PR#752)
In-Reply-To: Peter Dalgaard BSA's message of "05 Dec 2000 14:59:39 +0100"
References: <200011281942.UAA17414@pubhealth.ku.dk> <x2ofyrnlrb.fsf@blueberry.kubism.ku.dk> <x2lmtvnf3o.fsf@blueberry.kubism.ku.dk>
Message-ID: <x2itoyoqtl.fsf@blueberry.kubism.ku.dk>

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   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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[Rd] non-centrality parameter in pf() (PR#752)
Peter Dalgaard BSA