[General Information]

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


[Fitting Parameters]

Naming Method=user-defined
Names=a, l, k, d
Lower bounds=--,--,--,--
Upper bounds=--,--,--,--
Meanings=coefficient,unknown,unknown,unknown


[Independent Variables]

x = 


[Dependent Variables]

y = 


[Constants]


[Formula]

y = a*( 1 + exp( -(l+k*x)/d) )^d

[Constraints]

d != 0

[Initializations]


[After fitting]


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

