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我正在从数据库中执行简单的数据提取并将内容导出到 Excel 电子表格。我有两个按钮：

  1. 从数据库中提取数据并使用uitable.
  2. 将uitable数据导出到 Excel 电子表格。

问题：

我似乎无法将这两个功能联系在一起。它不断抛出以下错误：

堆栈跟踪：

Undefined function or variable 'num'.

Error in FatherSonGUI>pushbutton3_Callback (line 155)
    xlswrite('test.xls',num)

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in FatherSonGUI (line 42)
    gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)FatherSonGUI('pushbutton3_Callback',hObject,eventdata,guidata(hObject))

 
Error while evaluating uicontrol Callback

示例图片：

在此处输入图像描述

代码 - 提取数据

% --- Executes on button press in GenerateData.
function generateWAR(hObject, eventdata, handles)
 
f = gcbf(); % size of the figure object
dat = dyn_conformer.Data;
set(f,'name','Father & Son War Room','numbertitle','off') %renames the Title Figure
cnames = {'PROCESS STATUS ID','TASK ID','TASK TYPE', 'CARTRIDGE ID', 'DISPLAY ORDER'};
rnames = {'1','2','3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20','21', '22', '23', '24', '25'};
t = uitable('Parent',f,'Data',dat,'ColumnName',cnames,... 
            'RowName',rnames,'Position',[10 100 1150 370]); % size of the values inside the figure object

    col = get(t,'ColumnName');
    data = get(t,'Data');
    %num = [col';data(:,1:length(col))];
    num = [col';data];

代码 - 导出 UITable 数据

% --- Executes on button press in ExportData.
function pushbutton3_Callback(hObject, eventdata, handles)


button = questdlg('Would you like to Export the data to a folder?',...
'Confirm','Yes','No','Cancel Program','No')

if strcmp(button,'Yes')
    
    FileName = uiputfile('*.xls','Save as');
    xlswrite('test.xls',num)
    
elseif strcmp(button, 'No')
    helpdlg('File not exported!','Message')
    
elseif strcmp(button, 'Cancel Program')
    helpdlg('Program cancelled!','Message')
    
end

基本上，我num在function pushbutton3_Callback-->中引用了变量xlswrite('test.xls',num)，该变量取自function generateWAR编译列和数据元素的位置。

我将不胜感激这方面的一些帮助。

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1 回答 1

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变量num不在pushbutton3_Callback. pushbutton3_Callback根据您的整体架构以及您是否以编程方式或通过 GUIDE 对 GUI 进行编码，您有多种可能使该变量可用。

为了查看函数范围内的内容，只需添加whos到函数的开头，就像这样

function pushbutton3_Callback(hObject, eventdata, handles)    
whos
button = questdlg('Would you like to Export the data to a ... 
    folder?','Confirm','Yes','No','Cancel Program','No')
% and so on
于 2014-08-27T10:19:08.033 回答