Export FIS and Simulation Data from Fuzzy Logic Designer

Once you design or tune your FIS using Fuzzy Logic Designer, you can export the active and stored designs to:

• The MATLAB^® workspace

• FIS files (*.fis)

You can also export simulation results for your FIS designs.

Export FIS to Workspace

To export a FIS design to the MATLAB workspace, in Fuzzy Logic Designer, select Export > Export Fuzzy Inference System to Workspace.

The Export Fuzzy Inference System to Workspace dialog box lists the active FIS design along with any stored designs.

In the Export column, select one or more systems that you want to export.

In the Export As column, specify names for the workspace variables.

Click Export.

The app saves the FIS to the MATLAB workspace as one of the following types of objects.

• mamfis — Type-1 Mamdani FIS

• sugfis — Type-1 Sugeno FIS

• mamfistype2 — Type-2 Mamdani FIS

• sugfistype2 — Type-2 Sugeno FIS

Once you export your FIS, you can:

• Perform additional simulations at the command line using the evalfis function.

• Simulate your system in Simulink^® using the Fuzzy Logic Controller block.

• Generate code for your system. For more information, see Deployment.

Save FIS to File

You can save your FIS between Fuzzy Logic Designer sessions using a FIS file. To do so, in Fuzzy Logic Designer, under Save, select the fuzzy inference system.

You can select the current active design or any of the stored designs.

In the Save Fuzzy Inference System dialog box, specify a filename and location, and click Save.

Export Simulation Data

After evaluating your FIS using Fuzzy Logic Designer, you can export the following simulation results to the MATLAB workspace for the active and stored designs.

• Control surface data points

• Rule inference data

In Fuzzy Logic Designer, select Export > Export Simulation Results to Workspace.

The Export Simulation Results to Workspace dialog box lists the simulation results that are available for export.

The Simulation Results column indicates the FIS designs and the type of simulation data using one of the following entries, where <design> indicates the FIS design.

• <design>_ControlSurfaceData — Control surface data points

• <design>_RuleInferenceData — Rule inference data

• <design>_ErrorDistributionData — Error distribution data

• SystemValidationData — System validation data for all selected designs

In the Export column, select one or more simulation results that you want to export.

In the Export As column, specify names for the workspace variables.

Click Export.

The app saves each selected simulation result to the MATLAB workspace as a structure, as defined in the following table.

Simulation Data	Description
Control surface data points	Data points for the most recent plot displayed in the Control Surface document for the active design, exported as a structure with the following fields. X — Data values for first selected input Y — Data values for second selected input Z — Data values for selected output The dimensions of X, Y, and Z match the Mesh Points selections in the Control Surface document. This control surface data matches the data points generated by the gensurf function.
Rule inference data	Rule inference results for the active design, including intermediate computed values, exported as a structure with the following fields. inputs — Input values numSamplePoints — Number of sample points in output fuzzy sets. To specify this value, on the Design tab, set the Number of Samples parameter. outputs — Output values fuzzifiedInputs — Fuzzified input values ruleOutputs — Rule outputs calculated by applying the rule firing strengths to the output membership function using the FIS implication method aggregatedOutputs — Aggregated output calculated by combining the rule outputs using the FIS aggregation method rulefiringStrengths — Rule firing strengths calculated by applying the rule connection operator to the values of the fuzzified inputs The dimensions of the fuzzifiedInputs, ruleOutputs, aggregatedOutputs, and rulefiringStrengths fields depend on the type of FIS you exported. For more information, see evalfis.
Error distribution data	Error distribution data for the active design, exported as a structure with the following fields, each containing a numeric array. refInput — Validation input data specified on the Design in the Input Data drop-down list refOutput — Validation input data specified on the Design in the Output Data drop-down list simOutput — FIS outputs from processing the values in refInput simError — Simulation error, which is the difference between the values in refOutput and simOutput
System validation data	System validation data for all selected FIS designs, exported as a structure with the following fields, each containing a numeric array. refInput — Validation input data specified on the Design in the Input Data drop-down list refOutput — Validation input data specified on the Design in the Output Data drop-down list simOutput — FIS outputs from processing the values in refInput, returned as a structure with one field for each selected FIS design simError — Simulation error, which is the difference between the values in refOutput and simOutput, , returned as a structure with one field for each selected FIS design A selected design is a design for which you select the Compare option in the Design Browser.

For the active FIS design, the exported simulation results correspond to the simulation settings, such as the input values in the Rule Inference document or the selected axes in the Control Surface document, currently defined in the app.

For a stored FIS design, the exported simulation results correspond to the simulation settings when the design was most recently active in the app. In other words, the exported results for a stored design may not use the simulation settings currently defined in the app.