Creating a Nonlinear Design

Select DOE > Nonlinear Design, or click the Nonlinear Design button on the JMP Starter DOE page. Then, follow the steps below:

•	Identify the Response and Factor Column with Formula

•	Set Up Factors and Parameters in the Nonlinear Design Dialog

•	Enter the Number of Runs and Preview the Design

•	Make Table or Augment the Table

1.	Open a data table that contains a column whose values are formed by a formula that has parameters. This example uses Corn.jmp from the Nonlinear Examples folder in the sample data installed with JMP.

2.	Select DOE > Nonlinear Design to see the initial launch dialog.

3.	Select yield and click Y, Response. The response column cannot have missing values.

4.	Select quad and click X, Predictor Formula. The quad variable has a formula that includes nitrate and three parameters (Identify Response (Y) and the Column with the Nonlinear Formula (X)).

5.	Click OK on the launch dialog to see the Nonlinear Design DOE panels.

First, look at the formula for quad, shown in Formula for quad has Parameters a, b, and c, and notice there are three parameters. These parameters show in the Parameters panel of the Nonlinear design dialog, with initial parameter values.

Formula for quad has Parameters a, b, and c

Use Example of Setting Up Factors and Parameters to understand how to set up factor and parameter names and values.

•	The initial values for the factor and the parameters are reasonable and do not need to be changed.

•	If necessary, change the Distribution of the parameters to Uniform, as shown in Example of Setting Up Factors and Parameters.

1.	The Design Generation panel shows 150 as the default number of runs. This number includes observations in the current data. 147 runs are desired. Since there are originally 144 rows, 3 additional runs need to be added. Enter 147 in the Number of Runs edit box.

2.	Click Make Design before creating the data table to preview the design. Example Preview Design shows a partial listing of the design.

3.	The last step is to click either Make Table or Augment Table. The Make Table command creates a new table (Partial Listing of an Example Nonlinear Design Table) with all runs included. The Augment Table command adds the new runs to the existing table.