Dew Math for .NET
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Gamma cumulative distribution function (CDF).
Parameters |
Description |
double x |
Distribution domain, real positive value. |
double a |
Defines distribution scale parameter. a must be a positive scalar. |
double b |
Defines distribution shape parameter. b must be a positive scalar. |
the Gamma cumulative distribution function (CDF) for value x using the parameters a and b. Both parameters a and b must be positive, otherwise the result is NAN.
The gamma cumulative distribution is defined by the following equation:
where Gamma denotes the gamma function. The result is the probability that a single observation from a gamma distribution with parameters a and b will fall in the interval [0,x].
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