Matlab - Como Capturar datos en una GUIDE conun push button?

function varargout = graficas2(varargin)

gui_Singleton = 1;

gui_State = struct('gui_Name',       mfilename, ...

                   'gui_Singleton',  gui_Singleton, ...

                   'gui_OpeningFcn', @graficas2_OpeningFcn, ...

                   'gui_OutputFcn',  @graficas2_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 graficas2_OpeningFcn(hObject, eventdata, handles, varargin)

handles.output = hObject;

guidata(hObject, handles);

function varargout = graficas2_OutputFcn(hObject, eventdata, handles)

varargout{1} = handles.output;

function edit1_Callback(hObject, eventdata, handles)

global x

x(1,1)=str2double(get(handles.edit1,'string'));

function edit2_Callback(hObject, eventdata, handles)

global x

x(2,1)=str2double(get(handles.edit2,'string'));

function edit3_Callback(hObject, eventdata, handles)

global x

x(3,1)=str2double(get(handles.edit3,'string'));

function edit4_Callback(hObject, eventdata, handles)

global x

x(1,2)=str2double(get(handles.edit4,'string'));

function edit5_Callback(hObject, eventdata, handles)

global x

x(2,2)=str2double(get(handles.edit5,'string'));

function edit6_Callback(hObject, eventdata, handles)

global x

x(3,2)=str2double(get(handles.edit6,'string'));

function pushbutton1_Callback(hObject, eventdata, handles)

global x

fid=fopen('datoscaballero.txt','w');

fprintf(fid,'%5.3f %5.3f \n',x(:,1),x(:,2));

fclose(fid);

open('datoscaballero.txt')