Nonlinear Curve Fitting
The Main Steps Of Operation:
To implement nonlinear curve fitting, following these steps:
- Input your data in Data Editor.
- Select Stats -> Regression -> Nonlinear Curve Fitting from the menus.
- Select variables in Nonlinear Curve Fitting dialogbox, input model expression in Model Expression textbox, click Parameters... button to set the initial values of the parameters, and click OK button.
Note:
The maximum number of parameters Visual Stats allowed is 20. The names of parameters in Visual Stats must be one of the letters 'a' to 't' and must be priority selected alphabetically. For example, if your model has two parameters, the names of the two parameters must be 'a' and 'b'; if the model has four parameters, the names must be 'a', 'b', 'c' and 'd'.
Algorithms:
Gauss-Newton method and Levenburg-Marquardt method are provided.
|
