Matlab - Problema tablas GUI

function varargout = uitable_numero_de_columnas(varargin)

gui_Singleton = 1;

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

                   'gui_Singleton',  gui_Singleton, ...

                   'gui_OpeningFcn', @uitable_numero_de_columnas_OpeningFcn, ...

                   'gui_OutputFcn',  @uitable_numero_de_columnas_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 uitable_numero_de_columnas_OpeningFcn(hObject, eventdata, handles, varargin)

set(handles.edit1,'string',' ')

handles.output = hObject;

guidata(hObject, handles);

function varargout = uitable_numero_de_columnas_OutputFcn(hObject, eventdata, handles)

varargout{1} = handles.output;

function edit1_Callback(hObject, eventdata, handles)

columnas=str2double(get(hObject,'String')) ;

num_elem=cell(3,columnas);

num_elem(:,:)={''};

set(handles.uitable1,'Data',num_elem)