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clearSignals

Class: Simulink.sdi.CustomSnapshot
Package: Simulink.sdi

Clear signals plotted on subplots of a Simulink.sdi.CustomSnapshot object

Syntax

snap.clearSignals

Description

snap.clearSignals clears plotted signals from all subplots in the Simulink.sdi.CustomSnapshot object, snap. Using the clearSignals method does not affect any subplots or signals in your open Simulation Data Inspector session.

Examples

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This example shows how to copy view settings from one run to another and how to create figures using the Simulink.sdi.CustomSnapshot object.

Simulate Your Model and Get a Run Object

Configure the vdp model to save output data, and run a simulation to create data.

load_system('vdp')
set_param('vdp','SaveFormat','Dataset','SaveOutput','on')
set_param('vdp/Mu','Gain','1');
sim('vdp');

Use the Simulation Data Inspector programmatic interface to access the run data.

runIndex = Simulink.sdi.getRunCount;
runID = Simulink.sdi.getRunIDByIndex(runIndex);
vdpRun = Simulink.sdi.getRun(runID);

Modify Signal View Settings

Use the Simulink.sdi.Run object to access signals in the run. Then, modify the signal view settings. This example specifies the line color and style for each signal. The view settings for the run comprise the view settings for each signal and view settings specified for the plot area.

sig1 = vdpRun.getSignalByIndex(1);
sig2 = vdpRun.getSignalByIndex(2);

sig1.LineColor = [0 0 1];
sig1.LineDashed = '-.';

sig2.LineColor = [1 0 0];
sig2.LineDashed = ':';

Capture a Snapshot from the Simulation Data Inspector

Create a Simulink.sdi.CustomSnapshot object and use the Simulink.sdi.snapshot function to programmatically capture a snapshot of the contents of the Simulation Data Inspector.

snap = Simulink.sdi.CustomSnapshot;

You can use properties of the Simulink.sdi.CustomSnapshot object to configure the plot settings, like the subplot layout and axis limits, and to plot signals. When you use a Simulink.sdi.CustomSnapshot object to create your figure, these plot settings do not affect the Simulation Data Inspector.

snap.Rows = 2;
snap.YRange = {[-2.25 2.25],[-3 3]};
snap.plotOnSubPlot(1,1,sig1,true)
snap.plotOnSubPlot(2,1,sig2,true)

Use Simulink.sdi.snapshot to generate the figure you specified in the properties of the Simulink.sdi.CustomSnapshot object.

fig = Simulink.sdi.snapshot("from","custom","to","figure","settings",snap);

Copy the View Settings to a New Simulation Run

Simulate the model again, with a different Mu value. Use the Simulation Data Inspector programmatic interface to access the simulation data.

set_param('vdp/Mu','Gain','5')
sim('vdp');

runIndex2 = Simulink.sdi.getRunCount;
runID2 = Simulink.sdi.getRunIDByIndex(runIndex2);
run2 = Simulink.sdi.getRun(runID2);

To create a plot of the new output data that looks like the one you created in the previous step, you can copy the view settings to the run in a single line of code using Simulink.sdi.copyRunViewSettings. The Simulink.sdi.copyRunViewSettings function does not automatically update plot settings in Simulink.sdi.CustomSnapshot objects, so specify the plot input as false.

sigIDs = Simulink.sdi.copyRunViewSettings(runID,runID2,false);

Capture a Snapshot of the New Simulation Run

Use the Simulink.sdi.CustomSnapshot object to capture a snapshot of the new simulation run. First, clear the signals from the subplots. Then, plot the signals from the new run and capture another snapshot.

snap.clearSignals
snap.YRange = {[-2.25 2.25],[-8 8]};
snap.plotOnSubPlot(1,1,sigIDs(1),true)
snap.plotOnSubPlot(2,1,sigIDs(2),true)

fig = snap.snapshot("to","figure");

Introduced in R2018a