IDAX.PFISK - Cumulative Fisk distribution

The PFISK function returns the probability that the value of a variable that follows the Fisk distribution is smaller or equal to x.

Syntax

IDAX.PFISK(DOUBLE x, DOUBLE median, DOUBLE shape)

Parameter descriptions

x
Mandatory.
The value that is to be computed.
Min: 0.000000001
Data type: DOUBLE
median
Mandatory.
The median value of the distribution.
This value is also called scale.
Min: 0.000000001
Data type: DOUBLE
shape
Mandatory.
The shape of the distribution.
Min: 0.000000001
Data type: DOUBLE

If x, median, or shape is 0 or less, PFISK(x,median,shape) is null.

Returned information

DOUBLE the cumulative probability distribution from minus infinity to point x.