Matlab - ciclo for con text edit

if tram>1

    for i=1:tram

        set(handles.num_diam,'string',num2str(i));

        x(i,1)=get(handles.cap_diam,'string')

    end

end

function varargout = bucle_con_edit(varargin)

gui_Singleton = 1;

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

                   'gui_Singleton',  gui_Singleton, ...

                   'gui_OpeningFcn', @bucle_con_edit_OpeningFcn, ...

                   'gui_OutputFcn',  @bucle_con_edit_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 bucle_con_edit_OpeningFcn(hObject, eventdata, handles, varargin)

clear global

global tram  i

tram=2;  i=1;

handles.output = hObject;

guidata(hObject, handles);

function varargout = bucle_con_edit_OutputFcn(hObject, eventdata, handles)

varargout{1} = handles.output;

function cap_diam_Callback(hObject, eventdata, handles)

global tram i x

if tram>1

        set(handles.num_diam,'string',num2str(i));

        x(i,1)=str2num(get(handles.cap_diam,'string'));

          set(handles.listbox1,'string',x);

        i=i+1;

end

function listbox1_Callback(hObject, eventdata, handles)