Matlab GUI callback function problem.

Hi I'm using guide and I have created the GUI interface. I have 3 buttons and various user imput locations.

Each button uses certain amount of inputs and creates a graph using various functions and equations.

I want to create two more buttons, one that replaces the plot to show another plot and one button to return to the previous plot.

Any idea how I can go about doing that?

First button

function EXECUTE4_Callback(hObject, eventdata, handles)
% hObject    handle to EXECUTE4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
N = str2num(get(handles.N,'String'));
FourDigit = str2num(get(handles.FourDigit,'String'));
alpha = str2num(get(handles.alpha4,'String'));

      [x,y]= Airfoil4 (N,N,FourDigit);
    [xmid,ymid,Cp]=HessSmithPanel (x,y,alpha);
    [xU,yU,CpU]=UpperSurface (xmid,ymid,Cp,N);
    [iU_FS,xU_FS] = FalknerSkan(xU,CpU);
    [iU_SL,xU_SL] = StratfordLBL(xU,CpU);
    [iU_ST,xU_ST] = StratfordTBL(xU,CpU);
    xFS=xU_FS;
    xSL=xU_SL;
    xST=xU_ST;

    yFS=yU(iU_FS);
    ySL=yU(iU_SL);
    yST=yU(iU_ST);

    axes (handles.axes1);
    plot(x,y,'b',xSL,ySL,'*r',xST,yST,'*k',xFS,yFS,'*g');
    axis([-.1 1.1 -.4 .4]);
    legend ('Airfoil Contour', 'Stratford LBL', 'Stratford TBL','Falkner-Skan');
    title('Flow Separation Point (FSP)');
    xlabel('x/c');
    ylabel('y/c');
    guidata (hObject, handles);

Second Button

function EXECUTEC_Callback(hObject, eventdata, handles)
% hObject    handle to EXECUTEC (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
N = str2num(get(handles.N,'String'));

alpha = str2num(get(handles.alphaC,'String'));

    [x,y,N]= AirfoilC ;
    [xmid,ymid,Cp]=HessSmithPanel (x,y,alpha);
    [xU,yU,CpU]=UpperSurface (xmid,ymid,Cp,N);
    [iU_FS,xU_FS] = FalknerSkan(xU,CpU);
    [iU_SL,xU_SL] = StratfordLBL(xU,CpU);
    [iU_ST,xU_ST] = StratfordTBL(xU,CpU);
    xFS=xU_FS;
    xSL=xU_SL;
    xST=xU_ST;

    yFS=yU(iU_FS);
    ySL=yU(iU_SL);
    yST=yU(iU_ST);

    axes (handles.axes1);
    plot(x,y,'b',xSL,ySL,'*r',xST,yST,'*k',xFS,yFS,'*g');
    axis([-.1 1.1 -.4 .4]);
    legend ('Airfoil Contour', 'Stratford LBL', 'Stratford TBL','Falkner-Skan');
    title('Flow Separation Point (FSP)');
    xlabel('x/c');
    ylabel('y/c');
    guidata (hObject, handles);

Third Button

function EXECUTE5_Callback(hObject, eventdata, handles)
% hObject    handle to EXECUTE5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

N = str2num(get(handles.N,'String'));
FiveDigit = str2num(get(handles.FiveDigit,'String'));
alpha = str2num(get(handles.alpha5,'String'));

    [x,y]= Airfoil5 (N,N,FiveDigit);
    [xmid,ymid,Cp]=HessSmithPanel (x,y,alpha);
    [xU,yU,CpU]=UpperSurface (xmid,ymid,Cp,N);
    [iU_FS,xU_FS] = FalknerSkan(xU,CpU);
    [iU_SL,xU_SL] = StratfordLBL(xU,CpU);
    [iU_ST,xU_ST] = StratfordTBL(xU,CpU);
    xFS=xU_FS;
    xSL=xU_SL;
    xST=xU_ST;

    yFS=yU(iU_FS);
    ySL=yU(iU_SL);
    yST=yU(iU_ST);

    axes (handles.axes1);
    plot(x,y,'b',xSL,ySL,'*r',xST,yST,'*k',xFS,yFS,'*g');
    axis([-.1 1.1 -.4 .4]);
    legend ('Airfoil Contour', 'Stratford LBL', 'Stratford TBL','Falkner-Skan');
    title('Flow Separation Point (FSP)');
    xlabel('x/c');
    ylabel('y/c');
    guidata (hObject, handles);

Figure One

function FigureG_Callback(hObject, eventdata, handles)
% hObject    handle to FigureG (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
    axes (handles.axes1);
    plot(x,y,'b',xSL,ySL,'*r',xST,yST,'*k',xFS,yFS,'*g');
    axis([-.1 1.1 -.4 .4]);
    legend ('Airfoil Contour', 'Stratford LBL', 'Stratford TBL','Falkner-Skan');
    title('Flow Separation Point (FSP)');
    xlabel('x/c');
    ylabel('y/c');
    guidata (hObject, handles);

Figure Two

% --- Executes on button press in FigureP.
function FigureP_Callback(hObject, eventdata, handles)
% hObject    handle to FigureP (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
axes (handles.axes1);
plot(xU,CpU);
set(gca, 'YDir', 'reverse');
axis auto
title('Pressure Distribution');
xlabel('x/c');
ylabel('Cp');
guidata (hObject, handles);

TL;DR: Basically when I press the last two buttons, the function isn't recieving information that is created by the previous functions. Usually one of the button 1/2/3 is pressed. And then the user should press the figure buttons. Please let me know if there is an easier way to do this.

thank you