Last Update: 3/30/2015
Multiple Linear Regression tool in Origin does not support fitting with boundary yet. But as a workaround, you can define a user-defined function with multiple independent variables for nonlinear curve fitting, which allows to put boundaries. such as
To begin with, choose Tools:Fitting Function Builder from the Origin menu to define the function.
Then, set the Bounds and Linear Constrains for the coefficients
Click Finish to create this user defined fitting function.
Next, you can carry out nonlinear curve fitting with the user defined funciton
After fitting done, the results is shown in summary table and can meet the condition of constraint.
Keywords:Linear Curve Fit,Nonlinear Curve Fit, multiple linear regression, boundary, constraint