Enable Plotting Using the Simulation Data Inspector

From the UI

You can use the Simulation Data Inspector to inspect and compare floating-point and fixed-point logged input and output data. In the Fixed-Point Conversion tool:

  1. Click Advanced.

  2. In the Advanced Settings dialog box, set Plot with Simulation Data Inspector to Yes.

  3. At the Test Numerics stage in the conversion process, click Test Numerics, select Log inputs and outputs for comparison plots, and then click .

For an example, see Propose Fixed-Point Data Types Based on Derived Ranges (MATLAB Coder).

From the Command Line

You can use the Simulation Data Inspector to inspect and compare floating-point and fixed-point input and output data logged using the function. At the MATLAB® command line:

  1. Create a fixed-point configuration object and configure the test file name.

    fixptcfg = coder.config('fixpt');
fixptcfg.TestBenchName = 'dti_test';

  2. Select to run the test file to verify the generated fixed-point MATLAB code. Log inputs and outputs for comparison plotting and select to use the Simulation Data Inspector to plot the results.

    fixptcfg.TestNumerics = true;
fixptcfg.LogIOForComparisonPlotting = true;
fixptcfg.PlotWithSimulationDataInspector = true;

  3. Generate fixed-point MATLAB code using codegen.

    codegen -float2fixed fixptcfg -config cfg dti

For an example, see Propose Fixed-Point Data Types Based on Derived Ranges (MATLAB Coder).

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