gamstat (Statistics Toolbox)

Mean and variance for the gamma distribution.

Syntax

[M,V] = gamstat(A,B)

Description

[M,V] = gamstat(A,B) returns the mean and variance for the gamma distribution with parameters specified by A and B. Vector or matrix inputs for A and B must have the same size, which is also the size of M and V. A scalar input for A or B is expanded to a constant matrix with the same dimensions as the other input.

The mean of the gamma distribution with parameters a and b is ab. The variance is ab².

Examples

[m,v] = gamstat(1:5,1:5)
m =
     1     4     9    16    25
v =
     1     8    27    64   125
[m,v] = gamstat(1:5,1./(1:5))
m =
     1     1     1     1     1
v =
    1.0000    0.5000    0.3333    0.2500    0.2000

gamrnd geocdf