Probabilities.WeibullCDF Function

Weibull cumulative distribution function (CDF).

Pascal

function WeibullCDF(x: double; a: double; b: double): double; overload;

Parameters	Description
x	Function domain, zero or real positive value.
a	Distribution scale parameter, real positive value.
b	Distribution shape parameter, real positive value.

Returns

the Weibull cumulative distribution function for value x using the parameters a and b. Value x must be greater or equal than zero and parameters a and b must be positive numbers, otherwise the result is NAN.

Description

function WeibullPDF(x: single; a,b :single): single; overload;

The Weibull cumulative distribution function is defined by the following equation:

where I is the interval on which the Weibull CDF is not zero.