Initial State of NARX Values

Model menu> NARX Model Options > Initial State of NARX Values

The Initial State of NARX Values window contains the following elements:

Initial State of NARX Structure Inputs

This area contains one row for each input. Each row contains the following elements:

• <input>: Define a constant value for the input. This value is used for all steps prior to t₀.

• Use first seen: If activated, the input value in the first entry of the dataset is taken for all steps prior to t₀.

• Use NaN: For inputs, the initial values at t < t₀ are set to NaN. Prediction for the input starts at t_n, i.e., after n time steps and the output of the model is NaN before that.

  Note
  This setting is incompatible with a model which uses an output loopback, because prediction will be NaN for the whole dataset.

Initial State of NARX Structure Outputs

This area contains one row for each output, and another row to access data statistics. The rows contain the following elements:

• <output>: Define a constant value for the output. This value is used for all steps prior to t₀. By default, this field contains the mean values of the training data.

• Use first measured output value: Initializes the feedback structure using the first measured output value from the training data.

• Use mean: Initializes the feedback structure with the mean of the training data. This value is displayed in the tooltip.

• Data Statistics Open

  Opens the Statistics window that shows statistical information on the project.

  

  Use File > Export to store the information in an Excel (*.xls, *.xlsx) or CSV (*.csv) file.

  Activate in the View tab the parameters you want to be shown in the table.

OK

Applies your settings and closes the window.

Cancel

Discards your settings and closes the window.

 

See also  

Initial NARX Values