f21hyper {BMS} | R Documentation |
Computes the value of a Gaussian hypergeometric function F(a,b,c,z) for -1 ≤q z ≤q 1 and a,b,c ≥q 0
f21hyper(a, b, c, z)
a |
The parameter |
b |
The parameter |
c |
The parameter |
z |
The parameter |
The function f21hyper
complements the analysis of the 'hyper-g prior' introduced by Liang et al. (2008).
For parameter values, compare cf. http://en.wikipedia.org/wiki/Hypergeometric_function#The_series_2F1.
The value of the Gaussian hypergeometric function F(a,b,c,z)
This function is a simple wrapper function of sped-up code that is intended for sporadic application by the user; it is neither efficient nor general; for a more general version cf. the package 'hypergeo
'
Martin Feldkircher and Stefan Zeugner
Liang F., Paulo R., Molina G., Clyde M., Berger J.(2008): Mixtures of g-priors for Bayesian variable selection. J. Am. Statist. Assoc. 103, p. 410-423
http://en.wikipedia.org/wiki/Hypergeometric_function#The_series_2F1
package hypergeo
for a more proficient implementation.
Check http://bms.zeugner.eu for additional help.
f21hyper(30,1,20,.8) #returns about 165.8197 f21hyper(30,10,20,0) #returns one f21hyper(10,15,20,-0.1) # returns about 0.4872972