How can I use local variable from GUI

I created subroutine for my code named ' checkbox3' including 3 checkboxes. If I check a checkbox, it will return 1 and if not, it will return 0. For example, If I check the first and third box, I want it to return chk1=1;chk2=0;chk3=1. I really want these variables for my next step. I tried to use assignin function but it went to base workspace instead of my working workspace and I can't use these variable for my next step. So please give me some advice for this problem. Thank you very much! This is my code.

chk1=0;chk2=0;chk3=0;

assignin('base','chk1',chk1);assignin('base','chk2',chk2);... assignin('base','chk3',chk3);

% --- Executes on button press in checkbox1.

function chk1=checkbox1_Callback(hObject, eventdata, handles)

chk1=get(hObject,'Value');

assignin('base','chk1',chk1);

% --- Executes on button press in checkbox2.

function chk2=checkbox2_Callback(hObject, eventdata, handles)

chk2=get(hObject,'Value');

assignin('base','chk2',chk2);

% --- Executes on button press in checkbox3.

function chk3=checkbox3_Callback(hObject, eventdata, handles)

chk3=get(hObject,'Value');

assignin('base','chk3',chk3);

function pushbutton1_Callback(hObject, eventdata, handles)

close all

Answer 1

[Image Analyst]

All of that is unnecessary. Just check the values when you need them, or worst case, have a function to retrieve all of their values, like this:

function checkboxValues = GetCheckBoxValues(handles)
  checkboxValues (1) = get(handles.checkbox1, 'value');
  checkboxValues (2) = get(handles.checkbox2, 'value');
  checkboxValues (3) = get(handles.checkbox3, 'value');

Then just call that function whenever you need to get, use, or check the values:

checkboxValues = GetCheckBoxValues(handles);

No need for all of that complicated stuff you were doing in each individual callback.

[Nopparat]

Thanks a lot. That's very easy! However, usually for subroutine I can call local variables for using in another subroutine. For example,

function bio=bio_analysis(data1,data2) % main function

......

....

[option1 option2]= checkbox % 1st subroutine ( I failed this step. I couldn't get option1 and option2 from this subroutine to use for another subroutine) this checkbox subroutine is this same one as shown above

[info1 info2]= calculation(data1,data2) % 2nd subroutine

....

...

and so on.

end

How could I fix this problem? Thank you.

What's more, I tried to put 2nd subroutine into 1st one(in checkbox) like this (last function in my checkbox subroutine)

function pushbutton1_Callback(hObject, eventdata, handles,data1,data2) % I can't call the data1 and data2 from main function in this subroutine even though I put it in the argument so this function failed!

if checkboxvalue1==1

    [data_a]=bottomplane(data1);

else

end

if checkboxvalue2==1

    [data_b]=scape_bottom(data2);

else

end

Answer 2

[Azzi Abdelmalek]

In opening function

chk123=[0 0 0];
set(handles.checkbox1,'userdata',chk123)

%In checkbox1 function

function chk1=checkbox1_Callback(hObject, eventdata, handles)
chk1=get(hObject,'Value');
chk123=get(handles.checkbox1,'userdata');
chk123(1)=chk1;    % for chk2 it will be chk123(2)=chk2
set(handles.checkbox1,'userdata',chk123)

%or use guidata

%In opening function,

chk=[0 0 0];
handles.chk=chk;
guidata(hObject, handles);

%In checkbox1 function

chk1=get(hObject,'Value');
chk(1)=chk1; 
handles.chk=chk
guidata(hObject, handles);

[Nopparat]

Thank you very much for your suggestion. I tried both of your solutions but I still couldn't use variables for next step. I must do something wrong. Please take a look what I did

% --- Executes just before checkbox3 is made visible.

function checkbox3_OpeningFcn(hObject, eventdata, handles, varargin)

handles.output = hObject;

guidata(hObject, handles);

chk123=[0 0 0];

set(handles.checkbox1,'userdata',chk123)

% --- Outputs from this function are returned to the command line.

function varargout = checkbox3_OutputFcn(hObject, eventdata, handles)

% Get default command line output from handles structure

varargout{1} = handles.output;

% --- Executes on button press in checkbox1.

function chk1=checkbox1_Callback(hObject, eventdata, handles)

chk1=get(hObject,'Value');

chk123=get(handles.checkbox1,'userdata');

chk123(1)=chk1;

set(handles.checkbox1,'userdata',chk123)

% --- Executes on button press in checkbox2.

function chk2=checkbox2_Callback(hObject, eventdata, handles)

chk2=get(hObject,'Value');

chk123=get(handles.checkbox1,'userdata');

chk123(2)=chk2;

set(handles.checkbox1,'userdata',chk123)

% --- Executes on button press in checkbox3.

function chk3=checkbox3_Callback(hObject, eventdata, handles)

chk3=get(hObject,'Value');

% --- Executes on button press in pushbutton1.

chk123=get(handles.checkbox1,'userdata');

chk123(2)=chk2;

set(handles.checkbox1,'userdata',chk123)

function pushbutton1_Callback(hObject, eventdata, handles)

a= chk(1); % error !!!

close all

I still can't use variables for my next step. I think I must do something wrong! Thank you in advance

[Azzi Abdelmalek]

In the last function

function pushbutton1_Callback(hObject, eventdata, handles)
chk=get(handles.checkbox1,'userdata');
a= chk(1); % error !!!
close all

% you also did an error in checkbox3_Callback, it's

chk123(3)=chk3    % instead of chk123(2)=chk2

[Nopparat]

Thanks a lot! it works