stats_cdf_poisson
(PECL stats >= 1.0.0)
stats_cdf_poisson — Calculates any one parameter of the Poisson distribution given values for the others
Beschreibung
$par1
, float $par2
, int $which
): float
Returns the cumulative distribution function, its inverse, or one of its parameters, of the Poisson distribution.
The kind of the return value and parameters (par1
and par2
) are
determined by which
.
The following table lists the return value and parameters by which
.
CDF, x, and lambda denotes cumulative distribution function, the value of the random variable,
and the parameter of the Poisson distribution, respectively.
which |
Return value | par1 |
par2 |
---|---|---|---|
1 | CDF | x | lambda |
2 | x | CDF | lambda |
3 | lambda | x | CDF |
Parameter-Liste
-
par1
-
The first parameter
-
par2
-
The second parameter
-
which
-
The flag to determine what to be calculated
Rückgabewerte
Returns CDF, x, or lambda, determined by which
.