guidata doesn't save my data, why?

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László Arany
László Arany 2012-7-5
I have a GUI made in GUIDE. I need to store some data within functions and they must be reachable by other callbacks. I am using guidata like the following:
function MyFunction(input1,input2,...,inputN)
MyData = CalculateMyData(inputs);
handles.DataToSave = MyData;
guidata(gcf(),handles)
end
Later in another Callback I'm trying to get back the data and save it to a file like the following:
function SaveData(handles)
SavedData = handles.DataToSave;
dlmwrite(MyFile,SavedData,'\t')
end
However, the field DataToSave no longer exists. I know that the handles and the guidata are not the same structure, therefore I tried the following code as well:
function SaveData(handles)
MyGUIData = guidata(gcf());
SavedData = MyGUIData.DataToSave;
dlmwrite(MyFile,SavedData,'\t');
end
Unfortunately this code does not work either. How can I solve this problem? Any help is appreciated. László

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采纳的回答

Luffy
Luffy 2012-7-5
编辑：Walter Roberson 2012-8-13
I did not exactly understand,but you can try this method:
The data that you want to save in your 1st function,save it to base workspace.
assignin('base','handles.DataToSave','MyData');
Now that it is saved in base workspace,use it in your 2nd function by.
v = evalin('base','handles.DataToSave');
That Data is now in v,use v in your function where you wnt to.
Just see u hv handles.DataToSave in your base workspace.
Or this should help:
http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F

更多回答（3 个）

László Arany
László Arany 2012-7-5
Well, this does the trick, however, I still don't understand why my method doesn't work.
Andrei
Andrei 2012-8-13
编辑：Andrei 2012-8-13
I have a similar problem. But I do not understand the cause
Sean de Wolski
Sean de Wolski 2012-8-13
I am guessing that the use of gcf() is what is making this not work. If the figure's HandleVisibility is 'off' or 'callback', gcf() will create a new figure to be the current figure.
To fix it, rather than using gcf, use handles.( Tag of your figure ).

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