Statistics Toolbox

poissinv

Inverse of the Poisson cumulative distribution function (cdf).

Syntax

X = poissinv(P,LAMBDA)

Description

poissinv(P,LAMBDA) returns the smallest value X such that the Poisson cdf evaluated at X equals or exceeds P.

Examples

If the average number of defects () is two, what is the 95th percentile of the number of defects?

poissinv(0.95,2)
ans =
     5

What is the median number of defects?

median_defects = poissinv(0.50,2)
median_defects =
     2

See Also

icdf, poisscdf, poissfit, poisspdf, poissrnd, poisstat

poissfit

poisspdf