错误在我的代码......请帮我解决

Question

function listbox1_Callback(hObject, eventdata, handles) 

index_selected = get(hObject,'Value'); 
list = get(hObject,'String'); 
item_selected = list{index_selected}; % Convert from cell array % to string 
disp(item_selected); 
textdata=xlsread('stringipdata.xlsx'); 
GetColumnC(handles, textdata); 




function listbox2_Callback(hObject, eventdata, handles) 
index_selected = get(hObject,'Value'); 
list = get(hObject,'String'); 
item_selected2 = list{index_selected}; % Convert from cell array 
             % to string 
disp(item_selected2); 
textdata=xlsread('stringipdata.xlsx'); 
GetColumnC(handles, textdata); 




function itemFromColumnC = GetColumnC(handles, textdata) 


itemFromColumnC = []; % Initialize to null 

% Get the item number that they selected. 
selected1 = get(handles.listbox1, 'value'); 
selected2 = get(handles.listbox2, 'value'); 


% Get the contents (optional - just FYI in case you want to inspect) 
items1 = get(handles.listbox1, 'String'); 
items2 = get(handles.listbox2, 'String'); 
% Get the selected item (optional - just FYI in case you want to inspect) 
selectedItem1 = items1{selected1}; 
selectedItem2 = items2{selected2}; 


% Now compare 
if selected1 == selected2 
    % All indexes are the same so extract column C at that row. 

itemFromColumnC = textdata{selected1, 3}; 
    disp(itemFromColumnC); 

end 

错误是：

???来自非单元格数组对象的单元格内容引用。

错误在==> stringdata> GetColumnC在188 itemFromColumnC = textdata {selected1，3};

• 细胞值是字符串
• 我想显示的第三列单元值作为 输出。

Answer 1

xlsread的第一个输出是一个正常（双数）数组。第三个输出是一个包含xls所有内容的单元格数组。你应该这样称呼它：

[t1, t2, textdata] = xlsread('stringipdata.xlsx'); % or replace t1 and t2 by ~