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FDistributionInnerDistributionFunction Method

Gets the cumulative distribution function (cdf) for the F-distribution evaluated at point x.

Namespace:  Accord.Statistics.Distributions.Univariate
Assembly:  Accord.Statistics (in Accord.Statistics.dll) Version: 3.8.0
protected internal override double InnerDistributionFunction(
	double x
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Type: SystemDouble
A single point in the distribution range.

Return Value

Type: Double

The Cumulative Distribution Function (CDF) describes the cumulative probability that a given value or any value smaller than it will occur.

The F-distribution CDF is computed in terms of the Incomplete Beta function Ix(a,b) as CDF(x) = Iu(d1/2, d2/2) in which u is given as u = (d1 * x) / (d1 * x + d2)

See Also