Simulink.sdi.Signal object on Simulation Data Inspector
Plot Signals from Simulation Run
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
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); vdpRun.SignalCount
ans = int32 2
Plot Data Using
getSignalByIndex function to access signals from the
signal1 = getSignalByIndex(vdpRun,1); signal2 = getSignalByIndex(vdpRun,2);
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
signal1.Checked = true; plotOnSubPlot(signal2,2,1,true);
View the Plotted Data
To view the plots you just created, open the Simulation Data Inspector using the
sig — Signal to plot
Signal to plot, specified as a
r — Row index
Row index for the subplot, specified as an integer between
c — Column index
Column index for the subplot, specified as an integer between
checked — Plot or clear signal
Plot or clear the signal on the subplot, specified as one of these values:
trueplots the signal on the subplot.
falseclears the signal from the subplot.
You can use the Simulation Data Inspector UI to modify the plot layout and plotted signals. For more information, see Inspect Simulation Data.