Launch the Neural Platform

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Predictive and Specialized Modeling • Neural Networks • Launch the Neural Platform

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Launch the Neural Platform

To launch the Neural platform, select Analyze > Predictive Modeling > Neural.

Launching the Neural platform is a two-step process. First, enter your variables on the Neural launch window. Second, specify your options in the Model Launch control panel.

The Neural Launch Window

Use the Neural launch window to specify X and Y variables, a validation column, and to enable Informative Missing value coding.

Figure 3.3 The Neural Launch Window

Choose the response variable. When multiple responses are specified, the models for the responses share all parameters in the hidden layers (those parameters not connected to the responses).

Choose the input variables.

Choose a frequency variable.

Validation

Choose a validation column. For more information, see Validation Method. If you click the Validation button with no columns selected in the Select Columns list, you can add a validation column to your data table. For more information about the Make Validation Column utility, see Make Validation Column Utility in the Predictive and Specialized Modeling book.

Choose a variable to create separate models for each level of the variable.

Informative Missing

Check this box to enable informative coding of missing values. This coding allows estimation of a predictive model despite the presence of missing values. It is useful in situations where missing data are informative. If this option is not checked, rows with missing values are ignored.

For a continuous variable, missing values are replaced by the mean of the variable. Also, a missing value indicator, named <colname> Is Missing, is created and included in the model. If a variable is transformed using the Transform Covariates fitting option on the Model Launch control panel, missing values are replaced by the mean of the transformed variable.

For a categorical variable, missing values are treated as a separate level of that variable.

The Model Launch Control Panel

Use the Model Launch control panel to specify the validation method, the structure of the hidden layer, whether to use gradient boosting, and other fitting options.

Figure 3.4 The Model Launch Control Panel

Validation Method

Select the method that you want to use for model validation. For details, see Validation Method.

Specify a nonzero numeric random seed if you want to reproduce the validation assignment for future launches of the Neural platform. By default, the Random Seed is set to zero, which does not produce reproducible results. When you save the analysis to a script, the random seed that you enter is saved to the script.

Hidden Layer Structure or Hidden Nodes

Specify the number of hidden nodes of each type in each layer. For details, see Hidden Layer Structure.

Note: The standard edition of JMP uses only the TanH activation function, and can fit only neural networks with one hidden layer.

Specify options for gradient boosting. For details, see Boosting.

Fitting Options

Specify options for variable transformation and model fitting. For details, see Fitting Options.

Fits the neural network model and shows the model reports.

After you click Go to fit a model, you can reopen the Model Launch Control Panel and change the settings to fit another model.

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Help created on 7/12/2018