Simulink Data Inspector offset the time of an entire Run

I am using Simulink Data Inspector as a general tool to view data from a variety of data loggers and runs on a piece of physical equipment. Overall, I love SDI for rapidly showing many different plots and really great cursors.

What I'd like help with is offseting the time base in a given Run. Because of how data is captured during real running, I cannot guarantee that the event I'm trying to compare between runs happens at the same time.

An example of what I'm trying to do is below:

I've tried a few different thoughts I've had (sorry no code as it was all messing about on Command Window!) with modifying the time base of the timeseries in a given run and it hasn't been sucessfully shown in the SDI.

The specific help I need is:

• Change the time base of a given run. Not resampling, just an addition or subtraction to all time entries
• Update of all the plots with this new time base

I don't need help with:

• Picking the signal or data run to change
• Determining an actual offset to apply

Any help would be gratefully received.

Answer 1

[Kothuri]

Hi Stephen McLaren,

To Change the time base of a given run by an addition or subtraction to all time entries and update of all the plots with this new time base, you can modify the time data of the “timeseries” objects directly in MATLAB by following the below steps:

• Access the run data from SDI using the “Simulink.sdi.getRun” function
• Modify the time data of each signal by iterating through the signals in the run and adjusting their time vectors.
• After modifying the time vectors, the changes should automatically reflect in SDI. If SDI does not automatically refresh, you can manually update or refresh the display.

You can try the below code:

% Retrieve the run ID (replace with your specific run ID)
runID = Simulink.sdi.getAllRunIDs;
myRun = Simulink.sdi.getRun(runID(end)); % Example: getting the latest run

% Define the time offset (positive or negative)

timeOffset = 5; % Example: offset by 5 seconds

% Iterate through each signal in the run

for i = 1:myRun.SignalCount
    
    signal = myRun.getSignalByIndex(i);
    
    ts = signal.Values; % Get the timeseries object
    
    
    % Modify the time vector
    
    ts.Time = ts.Time + timeOffset;
    
    
    % Update the signal with the modified timeseries
    
    signal.Values = ts;
    
end

You can refer the below documentation link for more info on SDI:

https://www.mathworks.com/help/releases/R2021b/simulink/ug/configure-simulation-data-inspector.html

[Stephen]

Thanks!