Compute the Confluent Hypergeometric function: 1F1(a,b,c,t) = Gamma(b)/(Gamma(b-a)Gamma(a)) Int_0^1 t^(a-1) (1 - t)^(b-a-1) exp(c t) dt
Arguments
- a
arbitrary
- b
Must be greater 0
- c
arbitrary
- laplace
The default is to use the Cephes library; for large a or s this may return an NA, Inf or negative values,, in which case you should use the Laplace approximation.
- log
if TRUE, return log(1F1)
See also
Other special functions:
hypergeometric2F1()
,
phi1()
,
trCCH()
Author
Merlise Clyde (clyde@stat.duke.edu)