stats_dens_pmf_poisson
(PECL stats >= 1.0.0)
stats_dens_pmf_poisson — Probability mass function of the Poisson distribution
Description
$x
, float $lb
): float
Returns the probability mass at x
, where the random variable
follows the Poisson distribution whose parameter is lb
.
Parameters
-
x
-
The value at which the probability mass is calculated
-
lb
-
The parameter of the Poisson distribution
Return Values
The probability mass at x
or false
for failure.