通过MATLAB GUI使用不同的按钮功能导出UITable数据

Question

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显示它们。
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：



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，我在num - ＆gt;中引用了变量function pushbutton3_Callback。 xlswrite('test.xls',num)，取自function generateWAR，用于编译列和数据元素。

我希望得到一些帮助。

Answer 1

变量num不在pushbutton3_Callback的范围内。根据您的整体架构以及是以编程方式还是通过GUIDE编码GUI，您可以在pushbutton3_Callback内使此变量可用。

为了查看函数范围内的内容，只需将whos添加到函数的开头，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