Dew Math for .NET
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F cumulative distribution function (CDF).
Parameters |
Description |
double x |
Distribution domain, real positive value or zero. |
int Nu1 |
Defines distribution degrees of freedom. Nu1 must be a positive integer. |
int Nu2 |
Defines distribution degrees of freedom. Nu2 must be a positive integer. |
the F cumulative distribution function (CDF) for integer parameters Nu1 and Nu2 at the value X. Both Nu1 and Nu2 must be positive integer numbers, otherwise the result is NAN.
The F cumulative distribution function is defined by the following equation:
where n1=Nu1 and n2=Nu2 are degrees of freedom, and Gamma is the Math387.Gamma function. The result of FCDF is the probability that a single observation from an F distribution with parameters Nu1 and Nu2 will fall in the interval [0,x].
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