Stixbox Function

pgamma - The gamma cumulative distribution function

Calling Sequence

F = pgamma(x,a)

Parameters

Description

The gamma cumulative distribution function. F =Prob(X<=x) where X is a random variable with a gamma distribution of parameter a. The gamma density function with parameter a is:

  x.^(a-1)exp(-x)./Gamma(a)1_{x>=0} )