How to change the dashboard x axis

I want the Dashboard x axis based on other signal at current time step. how can i do this

[Walter Roberson]

For certainty: You are referring to https://www.mathworks.com/help/simulink/slref/dashboardscope.html ?

[Ajay Krishna Vasanthakumar]

In Dashboard scope it is always signal vs Time

Answer 1

[Abhishek]

Hi @Ajay Krishna Vasanthakumar

I understand that you are trying to configure the Dashboard Scope block in Simulink such that the X-axis is based on another signal (not simulation time).

Unfortunately, the Dashboard Scope block does not support customizing the X-axis. It is designed to display connected signals against simulation time only, and this behavior is not configurable.

If your use case requires plotting one signal against another during simulation (e.g., plotting y versus x, where both are time-varying signals), here are a few alternatives you can try:

• Use the XY Graph Block: You can use the XY Graph block, which supports real-time plotting of one signal versus another during simulation. Simply connect your desired X-axis signal and Y-axis signal to this block. This block can be found under Simscape, then Utilities.
• MATLAB Plot: Another option is to log both signals using the ‘To Workspace’ blocks and then use MATLAB to plot the results post-simulation with the following command:

plot(x_signal, y_signal) 

• Use Scope Block with Logging: You can use the standard Scope block to mark the signals for logging. After simulation, export the logged data to MATLAB and manually generate a custom XY plot.

I hope this helps.

[Ajay Krishna Vasanthakumar]

Hi Abhishek,

Thanks for the detailed explanation. XY plot will help for this use case. I am facing another challenge, it is a array signal of 30 dimension, i need to plot x[0] vs y[0].

[Abhishek]

Hi @Ajay Krishna Vasanthakumar, glad I could help. Can you please specify the problem properly?

[Abhishek]

Hi @Ajay Krishna Vasanthakumar, you can use the Selector block,by setting the index to 1, I was able to extract 'x[0]' and 'y[0]' (first element of the array signals, since Simulink uses 1-based indexing) and connect them to the XY Graph block. If you're plotting offline in MATLAB after simulation, you can use:

plot(x_signal(:,1), y_signal(:,1))

to get the same result.