Matlab加載列表框中的文件錯誤：輸入多餘的參數

Question

我是新來matlab，我想加載列表框中的多個文件。到目前爲止，我有這個代碼，但它顯示了我的這個錯誤： 輸入了多餘的參數，請檢查文檔。 這是我的代碼：

% --- Executes on button press in load. 
function load_Callback(hObject, eventdata, handles) 
% hObject handle to load (see GCBO) 
% eventdata reserved - to be defined in a future version of MATLAB 
% handles structure with handles and user data (see GUIDATA) 

[flnm, flpth,cCheck]=uigetfile({'*.mp3'},... 
          'File Select',... 
          'Multiset', 'on'); 
%fullpathname=strcat(pathname, filename); 
%text=audioread(fullpathname); 
%set(handles.path_song, 'String',fullpathname);%show full path name in the listbox 

assignin('base','flnm',flnm); 
assignin('base','flpth',flpth); 
assignin('base','cCheck',cCheck); 

%If the user did not press the cancell button 
if(cCheck==0) 
%Reset selection to first entry 
set(handles.playlist,'Value',1); 
%Show selected filenames 
set(handles.playlist,'String',flnm); 
end 
%LIST------------------------Display Files--------------------------------- 

function playlist_Callback(hObject, eventdata, handles) 
% hObject handle to playlist (see GCBO) 
% eventdata reserved - to be defined in a future version of MATLAB 
% handles structure with handles and user data (see GUIDATA) 

% Hints: contents = cellstr(get(hObject,'String')) returns playlist contents as cell array 
%  contents{get(hObject,'Value')} returns selected item from playlist 

listStr=get(hObject,'String'); 
listVal=get(hObject,'Value'); 

%Display Selected files 
if(iscell(listStr)) 
    fileName=playlistStr(listVal); 
    fprintf('Selected file:%s\n',fileName); 
else 
    fileName=listStr; 
    fprintf('Selected file:%s\n',fileName); 
end 

Answer 1

有在你的代碼中的一些錯誤：

• 在load_Callback cllback
  呼叫

  • 到uigetfile有一個錯字：推測Multiset應該是Multiselect

  • 測試if(cCheck==0)應該if(cCheck)：如果用戶按下Open按鈕，uigetfile回報1
• 在playlist_Callback

  • 在列表中的if(iscell(listStr))

    • 的名稱應該是listStr代替playlistStr
    • 如果條件離子被滿足（即如果listStr是cellarray），你必須使用char功能所選擇的項目（listStr(listVal)）從cellarray轉換爲char字符串，因爲fprintf不是爲cell輸入

定義

修復上面的錯誤，這兩個回調的結果：

% --- Executes on button press in load. 
function load_Callback(hObject, eventdata, handles) 
% hObject handle to load (see GCBO) 
% eventdata reserved - to be defined in a future version of MATLAB 
% handles structure with handles and user data (see GUIDATA) 

% [flnm, flpth,cCheck]=uigetfile({'*.txt'},... 
%        'File Select',... 
%        'Multiset', 'on'); 
[flnm, flpth,cCheck]=uigetfile({'*.txt'},... 
          'File Select',... 
          'Multiselect', 'on'); 
%fullpathname=strcat(pathname, filename); 
%text=audioread(fullpathname); 
%set(handles.path_song, 'String',fullpathname);%show full path name in the listbox 

assignin('base','flnm',flnm); 
assignin('base','flpth',flpth); 
assignin('base','cCheck',cCheck); 

%If the user did not press the cancell button 
%If the user did not press the cancell button 
% if(cCheck==0) 
if(cCheck) 
    %Reset selection to first entry 
    set(handles.playlist,'Value',1); 
    %Show selected filenames 
    set(handles.playlist,'String',flnm); 
end 

%LIST------------------------Display Files--------------------------------- 

function playlist_Callback(hObject, eventdata, handles) 
% hObject handle to playlist (see GCBO) 
% eventdata reserved - to be defined in a future version of MATLAB 
% handles structure with handles and user data (see GUIDATA) 

% Hints: contents = cellstr(get(hObject,'String')) returns playlist contents as cell array 
%  contents{get(hObject,'Value')} returns selected item from playlist 

listStr=get(hObject,'String'); 
listVal=get(hObject,'Value'); 

%Display Selected files 
if(iscell(listStr)) 
% % % fileName=playlistStr(listVal); 
    fileName=char(listStr(listVal)); 
    fprintf('Selected file:%s\n',fileName); 
else 
    fileName=listStr; 
    fprintf('Selected file:%s\n',fileName); 
end 

希望這有助於

Qapla'