How do I plot Simulink signal values saved to the MATLAB workspace on an axes?

I have to plot a signals in a MATLAB gui.

With Simulink I make a simulation and I save the signal in the workspace. I want to plot that signal in a gui axes but I dont know what I have to do.

[SAGAR DHOKIYA]

write code in workspace plot(ScopeData.time, ScopeData.signals.values)

Answer 1

[Arnaud Miege]

I assume you run the Simulink model from the MATLAB GUI using the sim command. The data from your Scope will end up in the GUI (caller) workspace rather than the base workspace. So you should be able to plot it using something like:

plot(ScopeData.time, ScopeData.signals.values)

You may need to specify the handle of the axis on which to plot the data.

Also have a look at this technical solution.

HTH,

Arnaud

[andoni]

i run the simulation in simulink, it's necesary to run it from gui??

[Arnaud Miege]

No, it isn't, but you indicated that you want to plot the signals in the MATLAB GUI, so I logically assume that you wanted to run the Simulink model from the GUI as well. It does have the advantage that the data will be readily available in the GUI workspace rather than the base workspace.

[andoni]

thank you so much!

[Ali Osman]

Thanks, worked. BUT How to draw a realtime?

[Mohammad Ali Sharifian]

Real time? When you run simulink, it executes the signals and blocks, with a 'To workspace' block you can save the real time data to MATLAB workspace and then plot it wherever you want.

Answer 2

[Walter Roberson]

Are you using a "To Workspace" block? If so then when you look at the variable, what class() and size() is it? And what kind of plot are you thinking of?

[andoni]

to save the data i use a option in the scope (save data to workspace) the format is a structure with time. in the workspace appears a structure and inside there are three fields: time, signals(<1x1 struct>, blockName.

I want to plot the signal in time

[Arnaud Miege]

Do you want to plot the data after the simulation has finished or while it's running? The former is easy, the latter more difficult.

[andoni]

i want to plot after finished

[Fangjun Jiang]

Use the command that Amaud Miege gave above.

plot(ScopeData.time, ScopeData.signals.values)

[Walter Roberson]

Though before that you might need to add

ScopeData = evalin('base', ScopeData);

in order to import the data from the base workspace in to the workspace of the current function.

[andoni]

thank you so much!

Answer 3

[Nuno Agualusa]

Hi,

I'm facing the same problem, but with a small diference. I'm running the simulink from GUI, but when the simulation finish doesn't apear a variable 'simout' in my base workspace. So i can´t plot the result on axes. I'm using a variable block in simulink, to get all the data to worspace. The only way that i found to get a variable in base workspace, is to run the simulation manualy in simulink.

what can i do to solve this situation?

Thank you very much.

Nuno

[Kaustubha Govind]

How are you running the SIM command? You might want to set 'DstWorkspace' to 'current' to make sure that Simulink uses your GUI function workspace as the destination workspace.

[Nuno Agualusa]

yes, the running command that i used is:

[tempo_simulacao]=evalin('base','tempo_sim');

[timeVector,stateVector,outputVector]=sim('Sistema_s_Atraso_SelfTuning',tempo_simulacao);

The problem is when a simulation ends i can't plot in my GUI axes the result of the simulation..and this action has to be peformed only trought out GUI.

Answer 4

[erhan]

I want set guı axes from scope value. Can you give example ?

Answer 5

[yati j]

Hello, Could u suggest me any tutorial or any solution to this

• i have my motor dc to run
• when the dc motor run/rotate, maybe a graph pop-up which is read my motor speed or relevant to the rotation
• i dont know the connection btween component
• i dont know how to draw the simulink

i've read and watched a lot of tutorial.

Thank You.

[Walter Roberson]

Please create a new Question for this.

Answer 6

[tran xuanminh]

>>plot(ScopeData.time,ScopeData.signals.values);
>>grid on;
??? >>plot(ScopeData.time,ScopeData.signals.values);
    |
Error: Unexpected MATLAB operator.

please coment my erro, thanks

[Walter Roberson]

Change your code to

plot(ScopeData.time,ScopeData.signals.values);
grid on;

[Pallavi Chaturvedi]

how to use plot when each signal value has 3 dimesions ,plot style [1,1,1].

[Mohammad Ali Sharifian]

use this for plotting dimension 1 of signal will work:

plot(ScopeData.time,ScopeData.signals.values(1,:));

or maybe this (I can't remmember):

plot(ScopeData.time,ScopeData.signals.values(:,1));

for dimension 2,3 of signal, simply use 2,3 instead of 1.

Answer 7

[Mohammad Ali Sharifian]

If you are working on a simulink file then using m-file codes for plotting is not a good idea. I recommend pasting your m-file codes in simulink at: model properties>callbacks>stop fcn

This way when you run your simulink, the results will be plotted automatically. see plotting codes here:

https://www.mathworks.com/help/matlab/ref/plot.html