GammaInv - script and chart function

GammaInv() returns the inverse of the accumulated probability of the Gamma distribution.

Syntax:

GammaInv(prob, k, θ)

Return data type: number

Arguments
Argument	Description
prob	A probability associated with the Gamma-probability distribution. It must be a number between 0 and 1.
k	A positive number defining the shape parameter.
θ	A positive number defining the scale parameter.

This function is related to the GammaDist function in the following way:
If prob = GammaDist(value, k, θ), then GammaInv(prob, k, θ) = value

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