How to get information about toggle state of checkboxes in GUI?

Hello,

currently i'm trying to build a GUI with GUIDE. The aim is to have an Array or Matrix 2x8 (8 checkboxes in figure) which contain the Information about the toggle state of the respective Checkbox. The gui function is saved seperately as an m.file an executed by its Name in main code. The following is part of the function created with GUIDE.

if true
  % --- Outputs from this function are returned to the command line.
function varargout = Auswahlbox_Werte_Zustaende_OutputFcn(hObject, ~, handles) 
% Get default command line output from handles structure
varargout{1} = handles.output;
%
% --- Executes on button press in checkbox2.
function checkbox2_Callback(hObject2, ~, handles)
v=get(hObject2,'Value')
%
% --- Executes on button press in checkbox3.
function checkbox3_Callback(hObject3, ~, handles)
gb=get(hObject3,'Value')
%
% --- Executes on button press in checkbox4.
function checkbox4_Callback(hObject4, ~, handles)
%
ped_d=get(hObject4,'Value')
%
% --- Executes on button press in checkbox5.
function checkbox5_Callback(hObject5, ~, handles)
%
p=get(hObject5,'Value')
%
% --- Executes on button press in checkbox6.
function checkbox6_Callback(hObject6, ~, handles)
%
s=get(hObject6,'Value')
%
% --- Executes on button press in checkbox7.
function checkbox7_Callback(hObject7, ~, handles)
ped_s=get(hObject7,'Value')
%
% --- Executes on button press in checkbox8.
function checkbox8_Callback(hObject8, ~, handles)
K1=get(hObject8,'Value')
%
% --- Executes on button press in checkbox9.
function checkbox9_Callback(hObject9, ~, handles)
K3=get(hObject9,'Value')
%
% Hint: get(hObject,'Value') returns toggle state of checkbox9
%
% --- Executes during object deletion, before destroying properties.
function pushbutton2_CreateFcn(hObject, eventdata, handles)
%
function pushbutton2_DeleteFcn(hObject, eventdata, handles)
%
function pushbutton2_Callback(hObject, eventdata, handles)
%
close(gcf);
%
end

One failure note I get is:

Undefined function or variable 'checkbox2_CreateFcn'.

Error in gui_mainfcn (line 95) feval(varargin{:});

Error in Auswahlbox_Werte_Zustaende (line 42) gui_mainfcn(gui_State, varargin{:});

Error in matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)Auswahlbox_Werte_Zustaende('checkbox2_CreateFcn',hObject,eventdata,guidata(hObject))

Thanks in advance!

Answer 1

[Adam]

You can fix that error by locating the checkbox in GUIDE, opening the Property Inspector for it and finding the 'CreateFcn' field and deleting what is in it.

That is not anything to do with the toggle state of the checkbox though so I don't know if that is just part of your question, but you didn't ask anything about toggle state despite it being in the title!

[laboratoryassist]

Thanks, Adam.

I cleared the 'CreateFcn' field and the failure is gone. With "The aim is to have an Array or Matrix 2x8 (8 checkboxes in figure) which contain the Information about the toggle state of the respective Checkbox." I meant to ask my question. Leaving the semicolons in the command window it can be seen how the variables get valued if the respective Checkbox is clicked:

%click checkbox2 --> (in command window) v=1

But when I ask for the value connected to the variable v, it says

>> v

Undefined function or variable 'v'.

Why do the variables not appear in the Workspace? I need to create a Matrix/Array with these.

Thanks in advance.

[Adam]

The variables are defined in a function so they have function scope. Generally there is no need to have variables appear in the base workspace from a GUI because they should be used within the GUI itself.

You can use

doc assignin

to do this, but it is ugly and I have never used it. It is generally a symptom of bad design to need to be doing that.

[laboratoryassist]

I'm afraid I'm still a beginner and need to realize it this way.

You helped me a lot. Thanks.