[R] Non-central distributions

(Ted Harding) Ted.Harding at nessie.mcc.ac.uk
Thu Oct 17 18:13:30 CEST 2002

Thanks, Peter! (Must try to give this some thought ...).

Anyway, in this respect R is still ahead of S-Plus, which
doesn't seem to carry ANY non-centrality as standard!
(Except possibly obscurely tucked away in some add-on library).


On 17-Oct-02 Peter Dalgaard BSA wrote:
> (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk> writes:
>> only the CDF functions 'pt' and 'pf' allow this parameter to
>> be set. (If you try in the others, you get the message
>> "unused argument(s) (ncp ...)").
>> Why is this? Being able to set it would be just as useful ...
> We don't have any references on how to calculate them! (Except for the
> brute-force approaches of numeric differentiation, root finding, and
> transformation of uniform distributions.)

E-Mail: (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk>
Fax-to-email: +44 (0)870 167 1972
Date: 17-Oct-02                                       Time: 17:13:30
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