s14abf

s14abf © Numerical Algorithms Group, 2002.

Purpose

S14ABF Log Gamma function

Synopsis

[fun_value,ifail] = s14abf(x<,ifail>)

Description

 
 This routine evaluates an approximation to ln(Gamma)(x). 
 
 For x>x     there is a danger of setting overflow so the routine 
        vbig                                                     
 must fail.

Parameters

s14abf

Required Input Arguments:

x                                     real

Optional Input Arguments:                       <Default>

ifail                                 integer  -1

Output Arguments:

ifail                                 integer