IDAX.DWEIBULL - Density of the Weibull distribution

The DWEIBULL function returns the probability density that the value of a variable that follows the Weibull distribution is equal to x.

Syntax

IDAX.DWEIBULL(DOUBLE x, DOUBLE scale, DOUBLE kShape)

Parameter descriptions

x
Mandatory.
The value that is to be computed.
Min: 0
Data type: DOUBLE
scale
Mandatory.
The scale of the distribution.
Min: 0.00000000001
Data type: DOUBLE
kShape
Mandatory.
The shape of the distribution.
The following conditions apply to the kShape parameter:
  • If the value of the shape parameter is <1, the failure rate decreases over time.
  • If the value of the shape parameter is 1, the failure rate is constant over time.
  • If the value of the shape parameter is >1, the failure rate increases over time.
Min: 0.00000000001
Data type: DOUBLE
If x is less than 0, or if scale or shape are 0 or less, DWEIBULL(x,scale,kShape) is null.

Returned information

DOUBLE the probability density at point x.