Configure and Simulate the Model

The slexAircraftExample model does not log data. Load the model and mark the input and output signals for logging.

load_system('slexAircraftExample')
Simulink.sdi.markSignalForStreaming('slexAircraftExample/Pilot',1,'on')
Simulink.sdi.markSignalForStreaming('slexAircraftExample/Aircraft Dynamics Model',4,'on')

Simulate the model. The data for the logged signals logs to the Simulation Data Inspector and to the workspace.

out = sim('slexAircraftExample');

Access Simulation Data

Use the Simulation Data Inspector programmatic interface to access the data. The Simulink.sdi.Run.getLatest function returns the most recently created run in the Simulation Data Inspector repository. Use the getSignalIDByIndex function to access the signal IDs for the logged signals.

aircraftRun = Simulink.sdi.Run.getLatest;

signalID1 = getSignalIDByIndex(aircraftRun,1);
signalID2 = getSignalIDByIndex(aircraftRun,2);

Specify Tolerance Values

You can specify tolerance values to use in the comparison as a property in the logged Simulink.sdi.Signal object. Use the Simulink.sdi.getSignal function to access the Signal object using the signal ID.

signal1 = Simulink.sdi.getSignal(signalID1);
signal1.AbsTol = 0.1;

Compare Signals

Use the Simulink.sdi.compareSignals function to compare the input and output signals. This example uses the isValidSignalID function to verify that both signal IDs are still valid before calling the Simulink.sdi.compareSignals function. A signal ID becomes invalid when the signal is deleted from the Simulation Data Inspector. After the comparison, check the status in the Simulink.sdi.DiffSignalResult object.

if (isValidSignalID(aircraftRun,signalID1) && isValidSignalID(aircraftRun,signalID2))
    sigDiff = Simulink.sdi.compareSignals(signalID1,signalID2);

    match = sigDiff.Status
end

match = 
OutOfTolerance

The comparison result is out of tolerance. You can use the Simulink.sdi.view function to inspect and analyze the comparison results.

Load Model and Mark Signals for Streaming

User get_param to get the port handles for the blocks with your signals of interest. Then, use the handle to mark the desired signals for logging.

load_system('vdp')

% Get port handles
x1_handles = get_param('vdp/x1','PortHandles');
x1 = x1_handles.Outport(1);
x2_handles = get_param('vdp/x2','PortHandles');
x2 = x2_handles.Outport(1);

% Mark signals for streaming
Simulink.sdi.markSignalForStreaming(x1,'on');
Simulink.sdi.markSignalForStreaming(x2,'on');

Simulate Model and View Signals in the Simulation Data Inspector

Simulate the model and then open the Simulation Data Inspector to view the logged signals.

sim('vdp');

Simulink.sdi.view

Load System and Mark Signals for Logging

Load a model and use get_param to get handles for the signals in the model. Then, use the line handles to mark signals of interest for logging.

load_system('slexAircraftExample')

lines = get_param('slexAircraftExample','Lines');

sig1handle = lines(1).Handle;
sig2handle = lines(2).Handle;

Simulink.sdi.markSignalForStreaming(sig1handle,'on')
Simulink.sdi.markSignalForStreaming(sig2handle,'on')

Simulate Model and View Signals

Simulate the model and view the signals marked for logging in the Simulation Data Inspector.

sim('slexAircraftExample')

Simulink.sdi.view