5.113 gammainc_lentz_vec

Loadable Function: f = gammainc_lentz_vec(x,a)

Continued fraction for incomplete gamma function (vectorized version). This function should be called from function gammainc_vec.m only.

Input and output variables:

• x: x value to calculate cumulative gamma distribution
• a: shape parameter
• f: return value of gamma cdf at x for a