Set Up Design Inputs

  1. Open the Model Browser by typing

    mbcmodel

    at the MATLAB® command prompt.

  2. In the project node view, in the Common Tasks pane, click Design Experiment.

  3. In the New Test Plan dialog box, select a template to define the structure of your model inputs: one-stage, two-stage, point-by-point, any user-defined templates, or any test plans in the current project. If you’re not sure which to choose, see Fit Models to Data to learn about one-stage, two-stage, or point-by-point models.

  4. Set up your model inputs. Use the following controls:

    • Number of Factors

      You can change the number of input factors using the buttons at the top.

    • Symbol

      The input symbol is used as a shortened version of the signal name. The symbol should contain a maximum of three characters.

    • Min and Max

      Define the Min and Max model range. This setting is important before you design experiments. The default range is [0.100]. There is usually some knowledge about realistic ranges for variables and you might be interested in modeling a particular region. Set the range of interest here.

    • Transform

      You can use input transformations to change the input factor for designing experiments. The available input transformations are 1/x, sqrt(x), log10(x), x^2, log(x).

    • Signal

      You can set up the signal name in the input factor setup dialog box. It is not necessary to set this parameter at this stage, as it can be defined later at the data selection stage (as with the range). However, setting the signal name in this dialog box simplifies the data selection procedures, as the Model Browser looks for matching signal names in loaded data sets. When the number of data set variables is large this can save time.

    Click OK.

    The Model Browser displays the test plan with your specified inputs.

  5. In the test plan node view, in the Common Tasks pane, click Design Experiment.

    The Design Editor window opens.

  6. Define constraints for the design. See Define Design Constraints.

  7. Create designs. See Create a Space-Filling Design, Create an Optimal Design, or Create a Classical Design.

  8. Export designs. See Save, Export, and Import Designs.

  9. After you collect data, return to the Model Browser to import data and fit models. In the test plan node view, in the Common Tasks pane, click Fit models. See Fit Models to Collected Design Data.