[R] dbinom and Catherine Loader

(Ted Harding) ted.harding at nessie.mcc.ac.uk
Fri Apr 6 15:56:32 CEST 2007

Hi Folks,
There has been past correspondence regarding Catherine Loader's
Bell Labs (oops, Lucent) paper

  "Fast and Accurate Computation of Binomial Probabilities"

which gives the algorithm on which R's dbinom() is based.

The original URL given in the R documentation "?dbinom" is:


but this link is dead. Likewise, Marc Schwarz (in reply to
Aries Arditi on Thu Dec 11 2003) gives


  "There is a link to the paper (as a Postscript file)
   at the bottom of that page, however the link appears
   to be dead."

I've just discovered that Catherine Loader seems to have cunningly
encoded herself as "c at herine.net". So now we can find a URL
for her dbinom:


which points to a PDF of the above paper at


(which, today at least, works). More generally, see


Best wishes to all,

E-Mail: (Ted Harding) <ted.harding at nessie.mcc.ac.uk>
Fax-to-email: +44 (0)870 094 0861
Date: 06-Apr-07                                       Time: 14:56:29
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