IDAX.PPOIS - Cumulative Poisson distribution

The PPOIS function returns the probability that the value of a variable that follows the Poisson distribution is smaller or equal to x. x is the number of successes that is expected within this time interval.

Syntax

IDAX.PPOIS(DOUBLE x, DOUBLE lambda)

Parameter descriptions

x: Mandatory.; The value that is to be computed.; If x is 0 or less, PPOIS(x,lambda) = 0 for all positive lambda values.; Data type: INT8
lambda: Mandatory.; The mean number of successes within a specified time interval.; If lambda is 0 or less, PPOIS(x,lambda) is null for all x values.; Min: 0.00000000001; Data type: DOUBLE

Returned information

DOUBLE the cumulative probability distribution from minus infinity to point x.