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