Logistipk

Contents 1 Function 2 Brief Description 3 Sample Curve 4 Parameters 5 Script Access 6 Function File 7 Category

Function

\[y=y_0+\frac{4Ae^{-\frac{x-xc}w}}{\left( 1+e^{-\frac{x-xc}w}\right) ^2}\]

Brief Description

Logistic peak function.

Sample Curve

Parameters

Number: 4

Names: y0, xc, w, A

Meanings: y0 = offset, xc = center, w = width, A = amplitude

Lower Bounds: w > 0.0

Upper Bounds: none

Script Access

nlf_logistpk(x,y0,xc,w,A)

Function File

FITFUNC\LOGISTPK

Category

Origin Basic Functions, Growth/Sigmoidal, Peak Functions