PWL3

 

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

Function

\[y=a_1+k_1x~~~~~~~~~~~~~(x<x_{i1})\]

\[y=y_{i1}+k_2(x-x_{i1})~~~~~(x_{i1}\le x<x_{i2})\]

\[y=y_{i2}+k_3(x-x_{i2})~~~~~(x\ge x_{i2})\]

\[y_{i1}=a_1+k_1x_{i1} \]

\[y_{i2}=y_{i1}+k_2(x_{i2}-x_{i1}) \]

Brief Description

Piecewise linear function with three segments.

Sample Curve

Parameters

Number: 6

Names: a1, k1, xi1, k2, xi2, k3

Meanings: a1 = Intercept, k1 = Slope, xi1 = Intersection, k2 = Slope, xi2 = Intersection, k3 = Slope

Lower Bounds: none

Upper Bounds: none

Script Access

nlf_PWL3(x,a1,k1,xi1,k2,xi2,k3)

Function File

FITFUNC/PWL3.FDF

Category

Piecewise