通过MATLAB GUI使用不同的按钮功能导出UITable数据

我正在从数据库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：

从数据库中提取数据并使用

uitable

显示它们

将

uitable

数据导出到Excel电子表格

问题：

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

我似乎无法将这两个函数连接在一起。它不断抛出以下错误：

Stacktrace:

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：

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

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];

% --- 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

代码-导出可编辑数据

% --- 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];

% --- 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，我在

函数按钮3\u Callback

-->

xlswrite（'test.xls'，num）

中引用了变量

num

，该变量取自编译列和数据元素的

函数生成器WAR

---

如果您能在这方面提供帮助，我将不胜感激。

变量

num

不在

按钮3\u回调的范围内。您可以在
pushbutton3\u Callback
中使用此变量，具体取决于您的总体架构，以及您是以编程方式还是通过指南编写GUI代码

为了查看函数范围中的内容，只需在函数开头添加
whos
，如下所示

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

我正在使用GUIDE构建GUI。此外，使用
whos
返回
pushbutton3\u Callback
的变量，而不是存储在工作区中的变量。是的，这就是目的。您会收到一个错误，告诉您
num
不在当前范围内。所以，要了解您的作用域是什么以及回调位于哪个作用域中（可能是回调嵌套在其他一些函数中），您可以使用whos（或者设置断点作为替代）。作为一项初步工作，您可以简单地使
num
全局可用。