Converting the program to the GUI version
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Hi. I have a problem because I've never used GUI before but now I must build GUI for my program. It consist of several stages: input datas from keyboard, generating matrices, two algoritms operating on created matrices. Now I have build something like this: 
But, my 'code' to input dates and to making matrix is hooked to button 'Generowanie macierzy' as a function, and now when I want to make new event hook to button 'Macierz kontroli parzystosci' program can not see variable from another function.
How to make the program use data between functions?
Thanks for help
回答（1 个）
Rik
2018-11-14
1 个投票
There are many ways to share data between callbacks. In the context of GUIs the most often used function is guidata.
2 个评论
Darek Myszk
2018-11-15
编辑：Darek Myszk
2018-11-15
Rik
2018-11-15
You should make sure to save that variable to your handles struct (with guidata), or to save it to the appdata.
In the callback to your first button, save it:
someVariable=rand;
handles.someVariable=someVariable;
guidata(handles.f,handles)
And then you can load it in your second callback:
if hasfield(handles,'someVariable')
someVariable=handles.someVariable;
else
error('someVariable was not assigned, run first button first')
end
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2018-11-14
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