Matlab app designer error related to an array
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Luis Ricardo Rivera Goitia
le 5 Mai 2023
Modifié(e) : Adam Danz
le 8 Mai 2023
I'm developing a GUI to show DC-motor current and speed signals, now I'm experiencing some code difficulties.
When running the code there's an error msg related to a point used in an array which actually runs perfectly in matlab .m code.
Does anyone know how to get rid of this error?
properties (Access = private)
current % Current in mA
speed % Speed in rad/s
time % Time in s
current_temp = [];
speed_temp = [];
time_temp = [];
Data
end
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Adam Danz
le 5 Mai 2023
The table appears to be empty (running from m-file)
MQTTSignal = mqttclient('tcp://broker.hivemq.com','Port',1883)
dataTT = read(MQTTSignal)
dataTT.Data
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Adam Danz
le 6 Mai 2023
Modifié(e) : Adam Danz
le 8 Mai 2023
Thanks for sharing the video!
> Any other suggestion to improve the plotting view?
Yes, the plotting can be more efficient. Instead of creating a new line object every iteration, you can update an existing line object.
% Create line objects
hCurrent = plot(app.UIAxes,nan,nan);
hSpeed = plot(app.UIAxes,nan,nan);
% update line objects within the loop
while strcmpi(...)
...
app.current = [app.current;app.current_temp];
app.speed = [app.speed;app.speed_temp];
app.time = [app.time;app.time_temp];
set(hCurrent,'XData',app.time,'YData',app.current)
set(hSpeed,'XData',app.time,'YData',app.speed)
end
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