weibcdf (Statistics Toolbox)

Weibull cumulative distribution function (cdf)

Syntax

```
P = weibcdf(X,A,B)
```

Description

P = weibcdf(X,A,B) computes the Weibull cdf at each of the values in X using the corresponding parameters in A and B. Vector or matrix inputs for X, A, and B must all have the same size. A scalar input is expanded to a constant matrix with the same dimensions as the other inputs. The parameters in A and B must be positive.

The Weibull cdf is

Examples

What is the probability that a value from a Weibull distribution with parameters a = 0.15 and b = 0.24 is less than 500?

probability = weibcdf(500,0.15,0.24)

probability =

    0.4865

How sensitive is this result to small changes in the parameters?

[A,B] = meshgrid(0.1:0.05:0.2,0.2:0.05:0.3);
probability = weibcdf(500,A,B)

probability =

    0.2929    0.4054    0.5000
    0.3768    0.5080    0.6116
    0.4754    0.6201    0.7248

var weibfit