Reference to non-existent field error

Question

MHS 2019-10-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/486176-reference-to-non-existent-field-error

评论： Stephen23 2019-10-18

采纳的回答： Adam

Hello Everyone. I am getting an error related to

Reference to non-existent field 'mystructdata'.

Error in GUI_ParametersFinal>pushbutton_Save_Callback (line 120)

data = handles.mystructdata;

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in GUI_ParametersFinal (line 42)

gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)GUI_ParametersFinal('pushbutton_Save_Callback',hObject,eventdata,guidata(hObject))

When I do not type any value inside the edit text boxes, it gives me this error when saving inside the mat file. How can I remove this error and save another value only, which is needed and not related to my struct fields.

My code for pushbutton save_ callback is this:

function pushbutton_Save_Callback(hObject, eventdata, handles)

startingFolder = pwd

defaultFileName = fullfile(startingFolder, '*.mat');

[baseFileName, folder] = uiputfile(defaultFileName, 'Select mat file');

if baseFileName == 0

return;

end

fullFileName = fullfile(folder, baseFileName);

if (exist('str') == 0); or if(exist('handles.mystructdata') == 0)

data.Level = handles.Level;

save(fullFileName,'data')

else

data = handles.mystructdata;

data.Level = handles.Level;

save(fullFileName,'data');

end

If I dont type anything inside the edit text boxes, I will like these text boxes to be ignored and just save that text box value in which I typed a value using structs fields. Thank you so much.