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

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andoni
andoni 2011-5-31
编辑： Mohammad Ali Sharifian 2024-4-4，15:21
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.

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Arnaud Miege
Arnaud Miege 2011-5-31
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
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Mohammad Ali Sharifian
Mohammad Ali Sharifian 2024-4-4，15:10
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.

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Walter Roberson
Walter Roberson 2011-5-31
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?
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Walter Roberson
Walter Roberson 2011-5-31
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.

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Nuno Agualusa
Nuno Agualusa 2012-1-28
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
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Kaustubha Govind
Kaustubha Govind 2012-1-30
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
Nuno Agualusa 2012-1-30
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.

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erhan
erhan 2013-11-30
I want set guı axes from scope value. Can you give example ?
yati j
yati j 2016-10-9
编辑：Walter Roberson 2016-10-9
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.
tran xuanminh
tran xuanminh 2017-7-26
编辑：Walter Roberson 2017-7-26
>>plot(ScopeData.time,ScopeData.signals.values);
>>grid on;
??? >>plot(ScopeData.time,ScopeData.signals.values);
|
Error: Unexpected MATLAB operator.
please coment my erro, thanks
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Mohammad Ali Sharifian
Mohammad Ali Sharifian 2024-4-4，15:16
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.

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Mohammad Ali Sharifian
Mohammad Ali Sharifian 2024-4-4，15:20
编辑：Mohammad Ali Sharifian 2024-4-4，15:21
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

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