stats_dens_pmf_poisson
stats_dens_pmf_poisson
Probability mass function of the Poisson distribution
float **stats_dens_pmf_poisson** float $x float $lb
Returns the probability mass at , where the random variable
follows the Poisson distribution whose parameter is .
x``lb
xThe value at which the probability mass is calculated
lbThe parameter of the Poisson distribution
The probability mass at or false for failure.
x