28.1.164 SLogistic2

Function

y=\frac a{1+\frac{a-y_0}{y_0}e^{-4W_{\max }x/a}}

Brief Description

Sigmoidal Logistic function, type 2.

Sample Curve

CFF Image468.jpg

Parameters

Number: 3

Names: y0, a, Wmax

Meanings: y0 = initial value, a = amplitude, Wmax = maximum growth rate

Lower Bounds: y0 > 0.0, a > 0.0, Wmax > 0.0

Upper Bounds: none

Script Access

 nlf_slogistic2(x,y0,a,Wmax)

Function File

FITFUNC\SLOGIST2.FDF

Category

Growth/Sigmoidal