MATLAB: Stupid question / pass Variables in a GUI

buttoncallbackvariables

hey folks, two simple questions 😀

function GetData_Callback(hObject, eventdata, handles)
x = str3num(get(handles.editbox1,'String'))
function UseData_Callback(hObject, eventdata, handles)
y = x +1 
disp(y)

How can I pass x form the 1st Button to the 2nd Button ?

Best Answer

Do you necessarily need to create x in the GetData_Callback? Why not just in the UseData_Callback? If you really need it this way, just initialize the variable x in the main function (before the callbacks start). Then the variable will be valid in the entire file (in all subfunctions).

Related Solutions

MATLAB: Get variables to Workspace

Each function has its own workspace, because this is (one of) the intention(s) of a function. Therefore this line must fail:

save('Variables.m', Total, Individual, defaultval)

It tries to save the variables, whose names are stores as Strings to the variables Total, Individual, and defaultval to the file 'Variables.m'. This contains several problems:

The variables Total, Individual, and defaultval are not defined in the current workspace, which is the workspace of the subfunction checkbox1_Callback.
Saving to an M-file is a bad idea, because the resulting file will not have a proper Matlab-Syntax. Use save to write binary files.
You do not want to write the variable whose name is store in the variable Total, but the variable called 'Total'. Then you need the name as a string:

save('Variables.mat', 'Total')

There are more problems in the posted code: The callbacks of the buttons do not store the values permanently, but only in their current workspace, which vanishes as soon as the function is left. I do not think that close is useful in the buttons callbacks, because it prevents any further activities with the selected values.

Please explain what you want to happen with the variables. "Save in the workspace" requires too much guessing for an answer.

MATLAB: Question regarding function using radiobutton status

Greg - consider placing your three radio buttons in a button group panel and assigning a SelectionChangeFcn callback to this panel. Whenever the user selects a radio button, this callback will fire and you will be able to changes the variables as you see fit based on the selected radio button

 function uipanel1_SelectionChangeFcn(hObject, eventdata, handles)
 selectedRadioBtnStr = get(hObject,'String');
 if strcmpi(selectedRadioBtnStr, 'Radio Button 1')
    handles.x = 1;
    handles.y = 2;
    handles.z = 3;
 elseif strcmpi(selectedRadioBtnStr, 'Radio Button 2')
    handles.x = 11;
    handles.y = 21;
    handles.z = 31;
 elseif strcmpi(selectedRadioBtnStr, 'Radio Button 3')
    handles.x = 111;
    handles.y = 211;
    handles.z = 311;
 end
 guidata(hObject,handles);

We then save those changes to the handles structure using guidata. See the attached for an example.

Best Answer

Related Solutions

MATLAB: Get variables to Workspace

MATLAB: Question regarding function using radiobutton status

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