field and structure calling

ching l — Fri, 18 Jul 2008 18:29:04 -0400

Did I misunderstand the use of field and structure?
Can someone point out my mistakes please.

%% PLAY AUDIO
function select_audio_Callback(hObject, eventdata, handles)

handles.randValue = rand;
wavplay(samples{ceil(length(samples)*handles.randValue)}{:}) ;

guidata(hObject, handles);

%%------------------------------

%% ANSWER

function answer_faster_Callback(hObject, eventdata, handles)

%% write answer in text with the corresponded audio
csvwrite(num2str (get(handles.randValue, 'Value')),[1]);

guidata(hObject, handles);

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field and structure calling