How to properly pass values in Guide?

Question

Alexandru Lapusneanu 2018-2-26

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/385027-how-to-properly-pass-values-in-guide

评论： Alexandru Lapusneanu 2018-2-26

I'm trying to pass some values to a "main function" so when I press the button simulate it should take account of the values and also should call a matlab script, but when I'm pressing the button ,nothing happens.

function minutsc_Callback(hObject, eventdata, handles)
% hObject    handle to minutsc (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
min=str2double(get(hObject,'String'))
function orasc_Callback(hObject, eventdata, handles)
% hObject    handle to orasc (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
ora=str2double(get(hObject,'String'))
...

And the main function

function pushbutton7_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
 global tspan
  tspan = get(handles.edit32, 'value');
  global y0
  y0(1,1)=get(handles.edit29, 'value');
  y0(2,1)=get(handles.edit26, 'value');
  y0(3,1)=get(handles.edit27, 'value');
  y0(4,1)=get(handles.edit28, 'value');
  y0(5,1)=get(handles.edit30, 'value');
  y0(6,1)=get(handles.edit31, 'value');
  global an
  an=get(handles.ancall, 'value');
  global luna
  luna=get(handles.lunasc, 'value');
  global zi
  zi=get(handles.zicall, 'value');
  global ora
  ora=get(handles.orasc, 'value');
  global min
  min=get(handles.minutsc, 'value');
  global sec
  sec=get(handles.seccall, 'value'); 
  global m
  m=get(handles.Masaedit, 'value'); 
  global A
  A=get(handles.Arias, 'value'); 
orbit

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Answer 1

Walter Roberson 2018-2-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/385027-how-to-properly-pass-values-in-guide#answer_307291

在 MATLAB Online 中打开

Your line

min=str2double(get(hObject,'String'))

calculates a value, and assigns it to a variable named min inside the minutsc_Callback workspace. Then, because there is no semi-colon at the end of the expression, it will display the output in the form

min = 
   .... some value here

After that, the function reaches the end and returns, destroying the local workspace. The only practical effect of this is to have displayed the value of the variable to the screen.

I recommend that you read

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

and also http://www.mathworks.com/help/matlab/math/parameterizing-functions.html as you should probably not be using global.