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"SWITCH expression must be a scalar or a character vector".

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Urayoan Ramos Santiago
Urayoan Ramos Santiago on 24 Oct 2020
Hello. I am trying to use a SWITCH statement that uploads a specific ECG data based on the selected string of a Pop-Up menu. This data should then be visualized in the Axes Box of the GUI. When I start running the GUI, the initial data is uploaded without any problems, but once I choose another string from the Pop-Up menu, it displays the error "SWITCH expression must be a scalar or a character vector." How do I fix this? I have uploaded photos of the Opening Function, plot function, and Pop-Up menu callback functions so you can better visualize the problem.

Answers (1)

Asad (Mehrzad)  Khoddam
Asad (Mehrzad) Khoddam on 24 Oct 2020
Try to get 'Value' in the call back function:
handles.patient = get(hObject,'Value');
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Asad (Mehrzad)  Khoddam
Asad (Mehrzad) Khoddam on 24 Oct 2020
Yes, you are right. 'Value' propertiy gives the index to the selected item.

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