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share data between guis

Asked by Joe Nunes on 25 Feb 2011
Hello,
I am trying to build a main gui and various sub guis to configure some data. This data can be an array. I've seen methods to update handles between guis, but not data.
What would be the best way to achieve this ?
Thanks in advance

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Thank you, I'll give it a try
Please see the FAQ,
http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F
Eric
on 10 Jan 2012
My preference (mentioned in the FAQ Walter cites) is to use application data (i.e., getappdata and setappdata). In the comment section at the start of each GUI I keep a list and description of what appdata values are stored.
I would avoid using the UserData property as in the future you may want to store other variables as well. Then you may have to switch from storing an array to storing a structure.
I prefer not to use the handles structure so that this structure always just refers to uicontrol handles.
These are personal preferences and there are a variety of ways to solve the problem, though.
-Eric

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3 Answers

Answer by Héctor Corte on 10 Jan 2012

Another way is to use global variables. But remember to write
global variable_name
in every place you use that variable. For example:
%In this function we set the value of global variable b
function Y=fun1(x,a)
global b
b=a;
Y=a*x
end
%In this function we use the global variable b wich was defined
% on fun1.
function y=fun2(x)
global b
Y=b*x
end

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globals are generally the wrong way to go - especially if they are so basically named. It is possible for the variable to be changed without your knowledge so it can be hard to trace.

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Answer by Alex
on 10 Jan 2012

You can achieve this through using matlab Classes. the link above is to a File Exchange example using a class to control a gui.
It's pretty easy to expand the example class from controlling a single GUI to multiple GUI's, and the parent class will contain all of the desired data and easily pass it to the gui's.

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Answer by David Dapuero on 13 Mar 2012

It´s maybe the closer way to the use of global variables.
Maybe it is a very basic solution and not the best...

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