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Plot Simulink.sdi.Signal object on Simulation Data Inspector subplot



plotOnSubplot(sig,r,c,checked) plots or clears the signal that corresponds to the Simulink.sdi.Signal object sig on the subplot specified by r and c.


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This example demonstrates how to access the Simulink.sdi.Run object for a Simulation Data Inspector run created by logging signals. From the Simulink.sdi.Run object you can get Simulink.sdi.Signal objects that contain the logged signal data and metadata. You can use the Signal objects and the plotOnSubPlot function to plot the data in the Simulation Data Inspector.

Create a Simulation Run and Access the Run Object

The ex_vdp model logs two signals. To create a simulation run containing the logged data, simulate the model.


The Simulation Data Inspector keeps track of runs by assigning a unique numeric run ID to each run created by simulation, importing data, or opening a session. To access the run object for the simulation you just performed, use the Simulink.sdi.getAllRunIDs function and take the last run ID in the returned vector.

runIDs = Simulink.sdi.getAllRunIDs;
runID = runIDs(end);

Once you have the run ID for the run, you can use the Simulink.sdi.getRun function to get the Simulink.sdi.Run object that corresponds to the run. You can use the Run object to check the metadata associated with the run, including the number of signals in the run.

vdpRun = Simulink.sdi.getRun(runID);

ans = int32

Plot Data Using Signal Objects

Use the getSignalByIndex function to access signals from the Run object, fuelRun.

signal1 = getSignalByIndex(vdpRun,1);
signal2 = getSignalByIndex(vdpRun,2);

Use the Simulink.sdi.setSubPlotLayout function to specify a 3-by-1 layout.


Before plotting the data, use the Simulink.sdi.clearAllSubPlots function to clear any data that is already plotted.


Plot one signal on each subplot. To plot signals on the first subplot, you can set the checked property for the signal. To plot signals on subplots other than the first subplot, use the plotOnSubPlot function.

signal1.Checked = true;

View the Plotted Data

To view the plots you just created, open the Simulation Data Inspector using the Simulink.sdi.view function.

Input Arguments

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Signal to plot, specified as a Simulink.sdi.Signal object.

Row index for the subplot, specified as an integer between 1 and 8, inclusive.

Example: 1

Column index for the subplot, specified as an integer between 1 and 8, inclusive.

Example: 2

Plot or clear the signal on the subplot, specified as one of these values:

  • true plots the signal on the subplot.

  • false clears the signal from the subplot.

Data Types: logical


You can use the Simulation Data Inspector UI to modify the plot layout and plotted signals. For more information, see Inspect Simulation Data.

Introduced in R2017b