Matlab - RECORRER UNA MATRIZ

if k==4

k=1;

end

function varargout = recorrer_matriz(varargin)

gui_Singleton = 1;

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

                   'gui_Singleton',  gui_Singleton, ...

                   'gui_OpeningFcn', @recorrer_matriz_OpeningFcn, ...

                   'gui_OutputFcn',  @recorrer_matriz_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 recorrer_matriz_OpeningFcn(hObject, eventdata, handles, varargin)

handles.output = hObject;

guidata(hObject, handles);

function varargout = recorrer_matriz_OutputFcn(hObject, eventdata, handles)

global n M

M=rand(1,3)

n=1;

varargout{1} = handles.output;

function pushbutton1_Callback(hObject, eventdata, handles)

global n M

if n<=3

    disp(M(1,n))

    n=n+1;

else

    n=1;

end 

global n M

k=dir('*mp3');

nombres={k.name};

M=rand(nombres)

n=1;

en el botton puse este codigo pero me sale error, basandome en el que me explicaste:

function togglebutton6_Callback(hObject, eventdata, handles)

% hObject    handle to togglebutton6 (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB

% handles    structure with handles and user data (see GUIDATA)

 Hint: get(hObject,'Value') returns toggle state of togglebutton6

global n M

if n<=3

 in_play=M;

set(handles.text5,'String',in_play)

[y,Fs]=audioread(in_play);

handles.player=audioplayer(y,Fs);

play(handles.player);

guidata(hObject, handles);

    n=n+1;

else

    n=1;

end

in_play=floor(nombres);

set(handles.text5,'String',in_play)

[y,Fs]=audioread(in_play);

handles.player=audioplayer(y,Fs);

play(handles.player);

guidata(hObject, handles);

 set(handles.text4,'String','Usted esta escuchando: ');

k=dir('*mp3');

nombres={k.name};

M=rand(nombres)

k=dir('*mp3');

nombres={k.name};

n=randi(3,1);

M=nombres(n);

in_play=M;

set(handles.text5,'String',in_play)

[y,Fs]=audioread(in_play);

k=dir('*mp3');

nombres={k.name};

n=randi(3,1);

M=nombres{n};

in_play=M;

set(handles.text5,'String',in_play)

[y,Fs]=audioread(in_play);

handles.player=audioplayer(y,Fs);

play(handles.player);

guidata(hObject, handles);