28.1.104 Logistic

Function

y=\frac{A_1-A_2}{1+\left( x/x_0\right) ^p}+A_2

Brief Description

Logistic dose response in Pharmacology/Chemistry.

Sample Curve

CFF Image308.jpg

Parameters

Number: 4

Names: A1, A2, x0, p

Meanings: A1 = initial value, A2 = final value, x0 = center, p = power

Lower Bounds: p > 0.0

Upper Bounds: none

Script Access

nlf_logistic(x,A1,A2,x0,p)

Function File

FITFUNC\LOGISTIC.FDF

Category

Origin Basic Functions, Growth/Sigmoidal,Statistics