SWeibull1

Contents

Function

y=A(1-e^{-\left( k\left( x-x_c\right) \right) ^d})

Brief Description

Sigmoidal Weibull function, type 1.

Reference: Seber, G. A. F., Wild, C. J. 1989. Nonlinear Regression. John Wiley & Sons, Inc. pp. 338 - 339

Sample Curve

Image:CFF Image488.jpg

Parameters

Number: 4

Names: A, xc, d, k

Meanings: A = amplitude, xc = center, d = power, k = coefficient

Lower Bounds: A > 0.0, k > 0.0

Upper Bounds: none

Script Access

 nlf_sweibull1(x,A,xc,d,k)

Function File

FITFUNC\WEIBULL1.FDF

Category

Growth/Sigmoidal