28.1.128 Poisson

Function

y=y0+\frac{e^{-r}r^x}{x!}

Brief Description

Poisson probability density function, a discrete probability distribution.

Sample Curve

CFF Image356.gif

Parameters

Number: 2

Names: y0, r

Meanings: y0 = offset, r = mean.

Lower Bounds: r0 > 0

Upper Bounds: none

Script Access

nlf_Poisson(x,a,b)

Function File

FITFUNC\POISSON.FDF

Category

Origin Basic Functions, Statistics