Matlab - Edit text a push button

function varargout = abrir_guardar_copias_imagenes(varargin)

gui_Singleton = 1;

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

                   'gui_Singleton',  gui_Singleton, ...

                   'gui_OpeningFcn', @abrir_guardar_copias_imagenes_OpeningFcn, ...

                   'gui_OutputFcn',  @abrir_guardar_copias_imagenes_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 abrir_guardar_copias_imagenes_OpeningFcn(hObject, eventdata, handles, varargin)

handles.output = hObject;

guidata(hObject, handles);

function varargout = abrir_guardar_copias_imagenes_OutputFcn(hObject, eventdata, handles)

varargout{1} = handles.output;

function abrir_archivo_Callback(hObject, eventdata, handles)

[filename, pathname] = uigetfile('*.xlsx')

if isequal(filename,0)

    return

else

a=xlsread(fullfile(pathname,filename));

 t=a(:,1)';

 b=a(:,2)';

 s=a(:,3)';

 p=a(:,4)';

end

guidata(hObject,handles)