Plot to axes from a simulink variable

Hi,

I'm trying to plot a variable from simulink in a axes GUI, and that what's happening:

I put the simulation running trought GUI with this command: [timeVector,stateVector,outputVector] = sim('Sistema_s_Atraso_SelfTuning',tempo_simulacao);

and when the simulation ends the ouput variable 'simout' to appear in my base worspace, due to that i can't plot the resulta in my GUI 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 read the output variable and pot in a GUI axes?

Thanks

Nuno

[TAB]

[I'm using a variable block in simulink]. What is "variable block" ?

Have you tried "ToWorkSpace" block?

You are runnung model manually or using "sim()" command, it dosn't make any difference in simulation output.

[Nuno Agualusa]

yes, it's a "ToWorkSpace" block, called "simout". i'm using the "sim()" command to start the simulation.

My objective is to get the data to plot in a axes GUI after simulation stops.

Thanks

Nuno

Answer 1

[Kaustubha Govind]

Try

sim('Sistema_s_Atraso_SelfTuning',tempo_simulacao, 'DstWorkspace', 'current');

This ensures that all variables created by Simulink use the current workspace as the destination.

EDIT:

The command needs to be:

opts = simset('DstWorkspace', 'current');
sim('Sistema_s_Atraso_SelfTuning',tempo_simulacao, opts);

[Nuno Agualusa]

Hi Kaustubha,

Thank you very much for your answer, but the code you gave me doesn't work:

??? Error using ==> INTERFACE_FINAL>run_Callback at 320

The "OPTIONS" parameter must be a structure created by SIMSET.

My problem is not start running simulink from GUI, my problem is when i start the simulation from GUI the variable in simulink 'simout' don't appear in my base workspace, so i can't plot it in a axes. The variable 'simout' is a ToWorkspace block.

But otherwise when i start running the simulation manually from simulink, the variable 'simout' appear in my base worspace, like a 1x1 struct.

I hope i have been clear.

Thank you very much for your time.

Nuno

[Kaustubha Govind]

Nuno: Yes, your problem is clear to me. The problem is that Simulink creates the 'simout' variable in the base workspace by default. To verify this, use "simout = evalin('base', 'simout');" after the SIM command - this will copy the variable from the base workspace to the GUI function workspace and make it available for plotting. Try:

opts = simset('DstWorkspace', 'current');

sim('Sistema_s_Atraso_SelfTuning',tempo_simulacao, opts);

[Nuno Agualusa]

Still the same Kaustubha. The only way to create the variable 'simout' in workspace is start manually the simulink system, if i start the simulink system trought out GUIDE it doesn't work.

Here is the code that i'm using:

function run_Callback(hObject, eventdata, handles)

% hObject handle to run (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

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

opts = simset('DstWorkspace', 'current');

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

simout = evalin('base', 'simout');

guidata(hObject, handles);

Thank you very much.

Nuno

[Kaustubha Govind]

You only need EITHER "opts = simset('DstWorkspace', 'current');" OR "simout = evalin('base', 'simout');" - not both. Using the first will cause an error in the second statement, because there is no simout variable created in the base workspace in that case.

[Nuno Agualusa]

It didn't work too. I don't know what to do more to solve this situation.

If you don't mind i could send to you my files just to look to them and see if i'm doing somethink wrong in other place.

Thank you very much.

Nuno