The gammadist function is the two-parameter family of continuous probability distributions. It is the maximum entropy probability distribution for a random variable X for which E[x] = kθ is fixed and greater than zero, and E[ln(x)] = ψ(k) + ln(θ) is fixed (ψ is the digamma function.) The gammadist function utilizes three arguments: Parameter x, Parameter k and Parameter theta. We can see how the gammadist function looks in the MD Document.
