I would like to know how I could use the the values for one function to another.

I would like to know how I could use the the values for num, den and sys I have in function untitled_OpeningFcn and use them on the pushbutton1_Callback function for the graphs and setting of the values of the text boxes.

             function untitled_OpeningFcn(hObject, eventdata, handles, varargin)
             handles.output = hObject;
             guidata(hObject, handles);

             if strcmp(get(hObject,'Visible'),'off')
             t = 0:0.25:7;
             y = sin(t);
             plot(t,y)
             end
             num = input('Enter coefficients of numerator: ');
             den= input('Enter coefficients of denominator: ');
             sys = tf([num],[den]);
             display('Your transfer function is: '); sys

            function pushbutton1_Callback(hObject, eventdata, handles)
              if true

              end
              axes(handles.axes1);
              cla;
              set(handles.numtxt, 'String', num2str(num));
              set(handles.dentxt, 'String', num2str(den));
              popup_sel_index = get(handles.popupmenu1, 'Value');
              switch popup_sel_index

                case 1
                pzmap(sys);

                case 2        
                rlocus(sys);

                case 3        
                nyquist(sys);

                case 4
                bode(sys);

                end

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F

[Harjinder Singh Pabla]

I added global num den inside the first function and then I added handles.num and den.

    num = input('Enter coefficients of numerator: ');
    den = input('Enter coefficients of denominator: ');
    sys = tf([num],[den]);
    display('Your transfer function is: '); sys
    handles.num = num;
    handles.den = den;

      num = handles.num;
      den = handles.den; 
      sys = tf(num,den);
      g = ilaplace(1/s^3);
      set(handles.text9, 'String', char(g));
      set(handles.numtxt, 'String', num2str(num));
      set(handles.dentxt, 'String', num2str(den));