Switch expression must be a scalar or string constant -- Matlab GUI
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Hello to everyone,
I am creating a GUI where a user can select with radio button three different type of steels. For the first two type, I don't have a problem because I call "304" and "316". The third option instead is a string value called "STR18" and when I try to execute my script Matlab says " Switch expression must be a scalar or string constant". I think that the problem could be in the variable "steeltype", but I am not sure. How can I solve my problem? How can I use, at the same time, numbers and string for the switch function ?
Thanks in advance
function pushbutton1_Callback(hObject, eventdata, handles)
st= get(handles.bottoni,'SelectedObject');
steeltype=str2num(get(st,'String'));
riduzione= str2num(get(handles.riduzione,'String'));
e=riduzione;
switch steeltype
case 1
......
case 2
......
case 3
......
otherwise
end
1 comentario
Stephen23
el 20 de Jul. de 2017
Why convert your perfectly nice strings into numbers? Get rid of the str2num and use strings to specify the switch cases.
Respuestas (1)
Adam
el 20 de Jul. de 2017
Editada: Adam
el 20 de Jul. de 2017
Just keep them all as strings. You can't convert STR18 to a number so don't convert the others either, just switch on the strings instead.
Incidentally you should use str2double rather than str2num.
5 comentarios
Jan
el 20 de Jul. de 2017
@Giuseppe: If the answer has helped you to solve the problem, please accept it.
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