Gamma Distribution


Menu location: Analysis_Distributions_Gamma.


The gamma distribution depends upon two parameters; A (the shaping parameter) and B (the scaling parameter).


The gamma density function is:


The gamma function Γ(*) is:


If A is an integer then Γ(A)=(A-1)! where x! is factorial x.


When A = 1 this gives an exponential distribution. If you vary A then the shape of the distribution will change. Changing B does not affect the shape of the distribution, just its scale on the x axis.


See random number fill.