MATLAB: Main function of GUI with a sub function, I want to get the output of sub function as input

gui

In my gui function there is a sub function (fcn1) that I want to get its output (y) for a push button callback (fcn2) in the main function, but I cannot get the output of sub function: I appreciate if anyone can help;
function [V]=Problem
sz=get(0,'ScreenSize');
figure('numbertitle','off','menubar','none','position',[sz(3)/3 sz(4)/4 sz(3)/2.8 sz(4)/1.5]);
uicontrol('style','text','string','Select equation','position',
[20 450 180 35],'fontsize',12,'backgroundcolor','g','horizontalalignment','left');
V.al=uicontrol('style','popup','string',{'choice A','Choice B'},...
'position',[220 450 150 35],'fontsize',12,'backgroundcolor','w','horizontalalignment','left');
     set(V.al,'callback',{@fcn1,V}); 
      function [V]=fcn1(varargin)
          V=varargin{3};
          if get(V.al,'value')==1
              helpdlg('3/x+2*x^2+1','Ref. Eqaution');
          else
              y=inputdlg('Vs=','User Equation',[1,33],{'sind(x)*x^2+1'});
          end
      end
uicontrol('style','pushbutton','string','ok','backgroundcolor','y','position',[200 20 30 30],'callback','[r]=fcn2(y);close');
end

Best Answer

function [V] = Problem
    sz = get(0, 'ScreenSize');
    fig = figure('numbertitle', 'off', 'menubar', 'none', 'position', [sz(3)/3 sz(4)/4 sz(3)/2.8 sz(4)/1.5], 'tag', 'Problem_fig');
    uicontrol('Parent', fig, 'style', 'text', 'string', 'Select equation', 'position', 
    [20 450 180 35], 'fontsize', 12, 'backgroundcolor', 'g', 'horizontalalignment', 'left');
    V.al = uicontrol('Parent', fig, 'style', 'popup', 'string', {'choice A','Choice B'}, ...
    'position', [220 450 150 35], 'fontsize', 12, 'backgroundcolor', 'w', 'horizontalalignment', 'left', ...
    'tag', 'V_a1');
    set(V.al, 'callback', {@fcn1, V}, 'UserData', '');
    uic3 = uicontrol('Parent', fig, 'style', 'pushbutton', 'string', 'ok', 'backgroundcolor', 'y', 'position', [200 20 30 30], 'callback', 'V_a1 = findobj(0, 'tag', ''V_a1''); y = get(V_a1, ''UserData''); [r] = fcn2(y); close(ancestor(V_a1, ''figure''))', 'enable', 'off');
    function fcn1(varargin)
      V = varargin{3};
      if get(V.al, 'value') ==1
        helpdlg('3/x+2*x^2+1','Ref. Equation');
      else
        y = inputdlg('Vs =', 'User Equation', [1,33], {'sind(x)*x^2+1'});
        set(V.a1, 'UserData', y);
        set(uic3, 'enable', 'on')
      end
    end
end
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