30.1.169 SRichards2
Contents
Function
![y=a\left[ 1+\left( d-1\right) e^{-k\left( x-xc\right) }\right] ^{1/\left( 1-d\right) },d\neq 1](/origin-help/en/images/SRichards2/math-09271094d86b687fd134784a79bb645b.png?v=0 "y=a\left[ 1+\left( d-1\right) e^{-k\left( x-xc\right) }\right] ^{1/\left( 1-d\right) },d\neq 1")
Brief Description
Sigmoidal Richards function, type 2.
Sample Curve
Parameters
Number: 4
Names: a, xc, d, k
Meanings: a = top asymptote, xc = center, d = unknown, k = coefficient
Lower Bounds: a > 0.0, k > 0.0
Upper Bounds: none
Script Access
nlf_srichards2(x,a,xc,d,k)
Function File
FITFUNC\SRICHAR2.FDF
Category
Growth/Sigmoidal