how to assign the value of a variable with push button?

I would like that by pressing a push button it assigns the value of for example u = 1, so that later that value will use it in another button and it can start my program

get(handles.pushbutton1,u=1);
get(handles.pushbutton3,u=2);
get(handles.pushbutton4,u=3);
get(handles.pushbutton5,u=4);

switch u
    case 1
m=[str2double(get(handles.edit3,'string')) str2double(get(handles.edit4,'string'))(str2double(get(handles.edit9,'string'))); str2double(get(handles.edit10,'string')) str2double(get(handles.edit11,'string')) str2double(get(handles.edit15,'string'))];
    case 2
m=[str2double(get(handles.edit3,'string')) str2double(get(handles.edit4,'string')) str2double(get(handles.edit6,'string')) (str2double(get(handles.edit9,'string'))); str2double(get(handles.edit10,'string')) str2double(get(handles.edit11,'string')) str2double(get(handles.edit12,'string')) (str2double(get(handles.edit15,'string'))); str2double(get(handles.edit16,'string')) str2double(get(handles.edit17,'string')) str2double(get(handles.edit18,'string')) str2double(get(handles.edit21,'string')) ];
    case 3

      case 4

      otherwise
      x=0
  end
  if all(size(m)==[2,3])
     h=1
  else
     if all(size(m)==[3,4])
         h=2
     else
         if all(size(m)==[4,5])
             h=3
         else

             if all(size(m)==[5,6])
                h=4

   end
         end
     end
  end
  switch h
      case 1

      m(1,:)=m(1,:)/m(1,1);
      m(2,:)=m(2,:)-(m(2,1))*(m(1,:));
      m(2,:)=m(2,:)/m(2,2);
      m(1,:)=m(1,:)-(m(1,2))*(m(2,:));

      x1=m(1,3)
      x2=m(2,3)
      set(handles.edit35,'string',x1);
      set(handles.edit36,'string',x2);
      case 2
      m(1,:)=m(1,:)/m(1,1);
      m(2,:)=m(2,:)-(m(2,1))*(m(1,:));
      m(3,:)=m(3,:)-(m(3,1))*(m(1,:));
      m(2,:)=m(2,:)/m(2,2);
      m(3,:)=m(3,:)-(m(3,2))*(m(2,:));
      m(3,:)=m(3,:)/m(3,3);
      m(2,:)=m(2,:)-(m(2,3))*(m(3,:));
      m(1,:)=m(1,:)-(m(1,3))*(m(3,:));
      m(1,:)=m(1,:)-(m(1,2))*(m(2,:));

      x1=m(1,4)
      x2=m(2,4)
      x3=m(3,4)
      set(handles.edit35,'string',x1);
      set(handles.edit36,'string',x2);
      set(handles.edit37,'string',x3);
      case 3
          x=3
      case 4
          x=2
      otherwise
          x=32
    end

Answer 1

[Walter Roberson]

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