stats_cdf_gamma
stats_cdf_gamma
(PECL stats >= 1.0.0)
stats_cdf_gamma — Calculates any one parameter of the gamma distribution given values for the others.
Description
float stats_cdf_gamma ( float $par1 , float $par2 , float $par3 , int $which )
Returns the cumulative distribution function, its inverse, or one of its parameters, of the gamma distribution. The kind of the return value and parameters (par1, par2, and par3) are determined by which.
The following table lists the return value and parameters by which. CDF, x, k, and theta denotes cumurative distribution function, the value of the random variable, and the shape and the scale parameter of the gamma distribution, respectively.
| which | Return value | par1 | par2 | par3 |
|---|---|---|---|---|
| 1 | CDF | x | k | theta |
| 2 | x | CDF | k | theta |
| 3 | k | x | CDF | theta |
| 4 | theta | x | CDF | k |
Parameters
par1
The first parameter
par2
The second parameter
par3
The third parameter
which
The flag to determine what to be calculated
Return Values
Returns CDF, x, k, or theta, determined by which.
← stats_cdf_f
stats_cdf_laplace →
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https://secure.php.net/manual/en/function.stats-cdf-gamma.php
