wav用matlab打不开,Matlab如何读取wav文件，为什么wavread不行啊

我的问题是这样的：我从listbox中选择一个项，双击，希望能把点击的文件(前提当然是wav文件)读入至矩阵中，我用的是如下的方法，不知道为什么不对，大概的代码是这样的。

function listbox_callback(hObject,eventdata,handles)

get(handles.figure1,'SelectionType');

index_selected = get(handles.listbox,'Value');

file_list = get(handles.listbox,'String');

...

%下面就是我出错的地方了

if strcmp(get(handles.figure1,'SelectionType'),'open')%代表双击

[data,fs,bits] = wavread(file_list{index_selected});

end

错误提示为：

Warning: Inputs must be character arrays or cell arrays of strings.

> In fileparts at 32

In wavread>open_wav at 162

In wavread at 52

In SimpleSimuPlatform>display at 315

In SimpleSimuPlatform>SimpleSimuPlatform_OpeningFcn at 58

In gui_mainfcn at 153

In SimpleSimuPlatform at 44

??? Error using ==> strrep

Conversion to double from struct is not possible.

Error in ==> fileparts at 32

name = strrep(name,'/','');

Error in ==> wavread>open_wav at 162

[pat,nam,ext] = fileparts(file);

Error in ==> wavread at 52

[fid,msg] = open_wav(file);

Error in ==> SimpleSimuPlatform>display at 315

[data,fs,bits]=wavread(filename);

Error in ==> SimpleSimuPlatform>SimpleSimuPlatform_OpeningFcn at 58

handles.output = hObject

Error in ==> gui_mainfcn at 153

feval(gui_State.gui_OpeningFcn, gui_hFigure, [], guidata(gui_hFigure), varargin{:});

Error in ==> SimpleSimuPlatform at 44

gui_mainfcn(gui_State, varargin{:});

不知道我问题阐述的大家明白了没，希望知道的给我个提醒，谢谢了