# 3.5.5.7 Poisson

## Description

This function returns npts number of random integers having a Poisson distribution with mean mean. Argument seed is optional. If seed is omitted, a different seed is used each time the function is called.

## Syntax

dataset poisson(int npts, double mean, int seed)

## Parameter

npts

the number of values in the returned dataset.

mean

the mean of the returned dataset.

seed

a positive integer used to initialize the returned pseudorandom dataset.

## Return

Returns npts number of random integers having a Poisson distribution with mean mean.

## Example

col(1) = poisson(100, 0.5, 2);