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wblstat

Weibull mean and variance

Syntax

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

Description

[M,V] = wblstat(A,B) returns the mean of and variance for the Weibull distribution with scale parameter, A and shape parameter, 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 Weibull distribution with parameters a and b is

a[Γ(1+b1)]

and the variance is

a2[Γ(1+2b1)Γ(1+b1)2]

Examples

[m,v] = wblstat(1:4,1:4)
m =
  1.0000  1.7725  2.6789  3.6256
v =
  1.0000  0.8584  0.9480  1.0346

wblstat(0.5,0.7)
ans =
  0.6329

Introduced before R2006a

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