weibinv (Statistics Toolbox)

Inverse of the Weibull cumulative distribution function

Syntax

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

Description

X = weibinv(P,A,B) computes the inverse of the Weibull cdf with parameters A and B for the corresponding probabilities in P. Vector or matrix inputs for P, 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 inverse of the Weibull cdf is

Examples

A batch of light bulbs have lifetimes (in hours) distributed Weibull with parameters a = 0.15 and b = 0.24. What is the median lifetime of the bulbs?

life = weibinv(0.5,0.15,0.24)

life =

  588.4721

What is the 90th percentile?

life = weibinv(0.9,0.15,0.24)

life =

   8.7536e+04

weibfit weiblike