Generates gamma distribution inverse cumulative density function values at specified locations.

Syntax

X = GammaInvCDF(Prob, a, b)

Arguments

Name

Description

Prob

A scalar, vector, or matrix of probabilities in the interval (0,1) at which the inverse cumulative density function is to be evaluated.

a

Shape parameter. A positive scalar. See Comments.

b

Scale parameter. A positive scalar. See Comments.

Outputs

Name

Description

X

A scalar, vector, or matrix of the inverse cumulative density function values for the given probabilities. The same size as Prob.

Example

Find the gamma inverse cumulative density function for probabilities 0.1, 0.3, and 0.8 with parameters a = 2 and b = 5.

Syntax

x = GammaInvCDF([0.1,0.3,0.8],2,5)

Results

x = 2.6591    5.4867    14.972

Comments

The form of distribution function is such that the mean is a*b.

See Also:

GammaCDF

GammaPDF

Probability Distributions