[General Information]

Function Name=SLogistic4	; name show up in the select function dialog
Brief Description=Four-Parameter Sigmoidal Logistic  	
Function Type=Built-in		; source type, built-in, user-defined, external dll
Function Form=Expression	; function form;
Function Source=fgroup.SLogistic4
Number Of Parameters=4
Number Of Independent Variables=1
Number Of Dependent Variables=1


[Fitting Parameters]

Naming Method=user-defined
Names=a,b,xc,k
Lower bounds=0.0(X,ON),0.0(X,ON),0.0(X,ON),--
Upper bounds=--,--,--,--
Meanings=amplitude, coefficient, position, rate

[Independent Variables]

x = 


[Dependent Variables]

y = 


[Constants]


[Formula]

y = b + (a-b)/(1 + exp(-k*(x-xc)))

[Constraints]


[Initializations]


[After fitting]


[Controls]
General Linear Constraints=Off
Initialization scripts=Off
Scripts After fitting=Off

