I'm using a code to pass values between guis. The first time it worked flawlessly, but the second time it neither gave me the output nor an error. Please help!

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Preethi Thomas 2016-3-17

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https://ww2.mathworks.cn/matlabcentral/answers/274104-i-m-using-a-code-to-pass-values-between-guis-the-first-time-it-worked-flawlessly-but-the-second-ti

编辑： Preethi Thomas 2016-4-7

This is the code I used. I found this answer submitted by Geoff Hayes in another similar question. The handle visibilty has been changed to on and the tags of my figures have been changed to their respective names. What am i doing wrong?

 function pushbutton1_Callback(hObject, eventdata, handles)
 % get the handle of Gui1
 h = findobj('Tag','Gui1');
 % if exists (not empty)
 if ~isempty(h)
    % get handles and other user-defined data associated to Gui1
    g1data = guidata(h);
    % maybe you want to set the text in Gui2 with that from Gui1
    set(handles.text1,'String',get(g1data.edit1,'String'));
    % maybe you want to get some data that was saved to the Gui1 app
    x = getappdata(h,'x');
 end

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Preethi Thomas 2016-3-17

编辑：Preethi Thomas 2016-3-18

在 MATLAB Online 中打开

Geoff,

I have a gui which calculates the length and breadth of an image using the number of pixels. These values are printed in two edit boxes in my first gui(openingpagedemo). I want to pass these values to an edit box in my second gui(page1). This is what is not happening. The following is the code we have used to calculate length and breadth

global b;
desired = [];
for n = 1:size(b,3)
    desired = cat(1,desired,b(:,:,n));
  end
  b = reshape(b,[],size(b,2),1);
  [a,c1]=size(b);
  count=zeros(a-1);
  count1=zeros(c1-1);
  for i=1:a
      for j=1:c1-1
          if (b(i,j)>0) && (b(i,j)==b(i,j+1))
              count(i)=count(i)+1;
          end
          if i<a-1
              if(b(i,j)>0)&&(b(i,j)==b(i+1,j));
                  count1(j)=count1(j)+1;
              end
          end
      end
  end
  l=max(max(count))+1;
  br=max(max(count1))+1;
  %angle=asind(l/b)
  set(handles.length1, 'String', num2str(l));
  set(handles.br1, 'String', num2str(br));
  guidata(hObject,handles);

And then in the pushbutton callback of page1,I've used the following code.

function pushbutton11_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton11 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
h = findobj('Tag','openingpagedemo');
   % if exists (not empty)
   if ~isempty(h)
      % get handles and other user-defined data associated to Gui1
      g2data = guidata(h);
      % maybe you want to set the text in Gui2 with that from Gui1
      set(handles.len1,'String',get(g2data.length1,'String'));
      % maybe you want to get some data that was saved to the Gui1 app
      %x = getappdata(h,'x');
   end

Any ideas on what I could do or change?

Geoff Hayes 2016-3-19

编辑：Geoff Hayes 2016-3-19

Preethi - when you try to get the values from openingpagedemo, is this GUI still available (i.e. visible to the user) or have you closed it? If it has been closed, then you will not be able to obtain the length and width from it.

Preethi Thomas 2016-3-19

编辑：Preethi Thomas 2016-4-7

Geoff, Yes I was closing it when I moved to page1. I never realised that page1 was never shut which was why it worked. Thank you!!! Now it works perfectly. :)

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