Matlab - menu matlab

hola mi duda es hacer que grafique con el pop-up menu ya que tengo un pushboton y el menu, mi idea es quitar el pushboton y solo graficar con el pop-up menu, hasta ahora solo con el pop-up me grafica solo un caso, y el otro con el pushboton, lo que quiero es graficar ambos casos con el pop-up solo que no se como expresarlo en el codigo si con un if o switch.
codigo completo:


function varargout = vs(varargin)




gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @vs_OpeningFcn, ...
'gui_OutputFcn', @vs_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end


function vs_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to vs (see VARARGIN)

% Choose default command line output for vs
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);



% --- Outputs from this function are returned to the command line.
function varargout = vs_OutputFcn(hObject, eventdata, handles)


% Get default command line output from handles structure
varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)



axes(handles.axes);
cla;
valor=get(handles.txt, 'string');
valor=str2num(valor);
valor2=get(handles.txt2, 'string');
valor2=str2num(valor2);

plot(valor,valor2,'-+m');
xlim([min(valor) max(valor)]);
ylim([min(valor2) max(valor2)]);
xlabel('centigrados');
ylabel('voltaje');
title('Gráfica sensor');

% --------------------------------------------------------------------
function FileMenu_Callback(hObject, eventdata, handles)
% hObject handle to FileMenu (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)


% --------------------------------------------------------------------
function OpenMenuItem_Callback(hObject, eventdata, handles)
% hObject handle to OpenMenuItem (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
file = uigetfile('*.fig');
if ~isequal(file, 0)
open(file);
end

% --------------------------------------------------------------------
function PrintMenuItem_Callback(hObject, eventdata, handles)
% hObject handle to PrintMenuItem (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
printdlg(handles.figure1)

% --------------------------------------------------------------------
function CloseMenuItem_Callback(hObject, eventdata, handles)
% hObject handle to CloseMenuItem (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
selection = questdlg(['Close ' get(handles.figure1,'Name') '?'],...
['Close ' get(handles.figure1,'Name') '...'],...
'Yes','No','Yes');
if strcmp(selection,'No')
return;
end

delete(handles.figure1)


% --- Executes on selection change in p1.
function p1_Callback(hObject, eventdata, handles)
% hObject handle to p1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns p1 contents as cell array
% contents{get(hObject,'Value')} returns selected item from p1


% --- Executes during object creation, after setting all properties.
function p1_CreateFcn(hObject, eventdata, handles)
% hObject handle to p1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called




function txt_Callback(hObject, eventdata, handles)

% hObject handle to txt (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of txt as text
% str2double(get(hObject,'String')) returns contents of txt as a double


% --- Executes during object creation, after setting all properties.
function txt_CreateFcn(hObject, eventdata, handles)
% hObject handle to txt (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end



function txt2_Callback(hObject, eventdata, handles)
% hObject handle to txt2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of txt2 as text
% str2double(get(hObject,'String')) returns contents of txt2 as a double


% --- Executes during object creation, after setting all properties.
function txt2_CreateFcn(hObject, eventdata, handles)
% hObject handle to txt2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end



function txt3_Callback(hObject, eventdata, handles)
% hObject handle to txt3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of txt3 as text
% str2double(get(hObject,'String')) returns contents of txt3 as a double


% --- Executes during object creation, after setting all properties.
function txt3_CreateFcn(hObject, eventdata, handles)
% hObject handle to txt3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end




% --- Executes on selection change in menu.
function menu_Callback(hObject, eventdata, handles)
%axes(handles.axes);
cla;

valor=get(handles.txt, 'string');
valor=str2num(valor);
valor2=get(handles.txt2, 'string');
valor2=str2num(valor2);


(plot(valor2,valor,'-+m'));
xlabel('voltaje');
ylabel('centigrados');
title('Gráfica sensor');





guidata(hObject, handles);
% Hints: contents = get(hObject,'String') returns menu contents as cell array
% contents{get(hObject,'Value')} returns selected item from menu


% --- Executes during object creation, after setting all properties.
function menu_CreateFcn(hObject, eventdata, handles)
% hObject handle to menu (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end