(PECL stats >= 1.0.0)
stats_cdf_negative_binomial — Calculates any one parameter of the negative binomial distribution given values for the others.
$par1
, float $par2
, float $par3
, int $which
)
Returns the cumulative distribution function, its inverse, or one of its parameters,
of the negative binomial 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, r, and p denotes cumurative distribution function, the number of failure, the number
of success, and the success rate for each trial, respectively.
which |
Return value | par1 |
par2 |
par3 |
|---|---|---|---|---|
| 1 | CDF | x | r | p |
| 2 | x | CDF | r | p |
| 3 | r | x | CDF | p |
| 4 | p | x | CDF | r |
par1The first parameter
par2The second parameter
par3The third parameter
whichThe flag to determine what to be calculated
Returns CDF, x, r, or p, determined by which.