[R] generalized hypergeometric function

Robin Hankin r.hankin at noc.soton.ac.uk
Wed Apr 19 09:48:16 CEST 2006

On 16 Apr 2006, at 19:12, Marc Schwartz wrote:

> On Sun, 2006-04-16 at 17:54 +0000, Ben Bolker wrote:
>> Marc Schwartz <MSchwartz <at> mn.rr.com> writes:
>>> On Sat, 2006-04-15 at 20:59 -0300, Bernardo Rangel tura wrote:
>>>> Hi R-masters
>>>> I need compute generalized hypergeometric function.
>>>> I look in R-project and R-help list and not find nothing about
>>>> generalized hypergeometric function
>>>> Is possible calculate the generalized hypergeometric function?
>>>> Somebody have a script for this?
>>   Note that he is looking for the h'geom FUNCTION, not DISTRIBUTION
>> (e.g. http://mathworld.wolfram.com/ 
>> GeneralizedHypergeometricFunction.html);
>> Robin Hankin wrote some code (hypergeo in the Davies package on CRAN)
>> to compute a particular Gaussian h'geom function, and was asking
>> at one point on the mailing list whether anyone was interested
>> in other code; I don't know whether it will be generalized
>> enough for you.
>>    Ben Bolker

Hello everyone.

The hypergeo() function of the Davies package has some functionality
for the F^2_1 case [it's been a long time; I  may be confusing my
subscripts and superscripts].

But this and other cases are covered by the gsl package, which is a  
for the GSL library (probably this is a much better option).

Going back to hypergeo(), it seems relatively easy to add any specific
number of extra superscript or subscript parameters.

But a truly generalized version (which would need to take a  vector of
superscript  parameters and a vector of subscript parameters) isn't so
easy.  It's on my List Of Things To Do, but I'm afraid it's not near  
the top.



Robin Hankin
Uncertainty Analyst
National Oceanography Centre, Southampton
European Way, Southampton SO14 3ZH, UK
  tel  023-8059-7743

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