SLogistic3

Contents

Function

y=\frac a{1+be^{-kx}}

Brief Description

Sigmoidal logistic function, type 3.

Reference: Seber, G. A. F., Wild, C. J. 1989. Nonlinear Regression. John Wiley & Sons, Inc. pp. 328 - 330

Sample Curve

Image:CFF Image472.jpg

Parameters

Number: 3

Names: a, b, k

Meanings: a = amplitude, b = coefficient, k = coefficient

Lower Bounds: a > 0.0, b > 0.0, k >0.0

Upper Bounds: none

Script Access

 nlf_slogistic3(x,a,b,k)

Function File

FITFUNC\SLOGIST3.FDF

Category

Growth/Sigmoidal