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ChiSquareDistributionInnerComplementaryDistributionFunction Method

Gets the complementary cumulative distribution function (ccdf) for the χ² distribution evaluated at point x. This function is also known as the Survival function.

Namespace:  Accord.Statistics.Distributions.Univariate
Assembly:  Accord.Statistics (in Accord.Statistics.dll) Version: 3.8.0
protected internal override double InnerComplementaryDistributionFunction(
	double x
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Type: SystemDouble

Return Value

Type: Double

The Complementary Cumulative Distribution Function (CCDF) is the complement of the Cumulative Distribution Function, or 1 minus the CDF.

The χ² complementary distribution function is defined in terms of the Complemented Incomplete Gamma Function Γc(a, x) as CDF(x; df) = Γc(df/2, x/d).

See Also