Trouble With GUI Button

I'm trying to set up a function that I can use to take a snapshot of something I work on before and after by pushing a button. Later I'm going to add something to append them together. My problem seems to be that I can only execute the print command once. I think it might be because it won't save over the new .ps file that I'm creating. I've tried the filename command to rename the files, but it doesn't seem to work. Also, I am having troubles changing the string of the button each time it is pushed. This is the section of code I'm having troubles with:

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

count = 0
pushed = get(hObject, 'Value');
    if count = 0
        filename = 'Before.ps';
        print('-dps','-s',gcs, filename);
        count = 1;
        set(hObject, 'String', 'After') ;
    else
        filename = 'After.ps';
        print('-dps','-s',gcs, filename);
        count = 0;
        set(hObject, 'String', 'Before') ;
    end

Answer 1

[Image Analyst]

Make count global or persistent.

[Image Analyst]

Steve, regarding your "Answer", see the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_save_my_figure.2C_axes.2C_or_image.3F_I.27m_having_trouble_with_the_built_in_MATLAB_functions.

Answer 2

[Steve]

This is the error I receive when I try to run it:

"??? Error using ==> print
Error using ==> graphics\private\inputcheck
Multiple inputs that look like filenames: 'simulink_file_1' and 'Before.ps'

Error in ==> BeforeAfter>pushbutton1_Callback at 87
        print('-dps','-s',gcs,filename);

Error in ==> gui_mainfcn at 75
        feval(varargin{:});

Error in ==> BeforeAfter at 42
    gui_mainfcn(gui_State, varargin{:});

??? Error while evaluating uicontrol Callback."

Clearly there is a problem with the use of the filename. I'm trying to print the current screen as a .ps file and save it under a predefined name. Unfortunately, it seems to be reading it as a command to print both the current screen AND the file yet to be printed. Any suggestions? Also, the count variable does not appear in my workspace when I execute without the file-naming. . .

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

global count;
count=0;
pushed = get(hObject, 'Value');
    for count = 0
        filename = 'Before.ps';
        print('-dps','-s',gcs,filename);
        count = 1;
        set(hObject, 'String', 'After') ;
    end
    for count = 1
        filename = 'After.ps';
        print('-dps','-s',gcs,filename);
        count = 0;
        set(hObject, 'String', 'Before') ;
    end