weibpdf (Statistics Toolbox)

Weibull probability density function (pdf).

Syntax

Y = weibpdf(X,A,B)

Description

weibpdf(X,A,B) computes the Weibull pdf with parameters A and B at the values in X. The arguments X, A and B must all be the same size except that scalar arguments function as constant matrices of the common size of the other arguments.

Parameters A and B are positive.

The Weibull pdf is:

Some references refer to the Weibull distribution with a single parameter. This corresponds to weibpdf with A =1.

Examples

The exponential distribution is a special case of the Weibull distribution.

lambda = 1:6;
y = weibpdf(0.1:0.1:0.6,lambda,1)

y =

    0.9048    1.3406    1.2197    0.8076    0.4104    0.1639

y1 = exppdf(0.1:0.1:0.6,1./lambda)

y1 =

    0.9048    1.3406    1.2197    0.8076    0.4104    0.1639

Reference

Devroye, L., Non-Uniform Random Variate Generation. Springer-Verlag. New York, 1986.

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