To avoid global variables, which is the best way to share variables among functions in a GUI in Matlab:

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Anjana Krishnan
Anjana Krishnan 2018-2-20
编辑： Stephen23 2018-2-20
1: Using setappdata/getappdata
2: Populating a structure other than 'handles' and then passing this structure as an argument to the functions
3: Populating 'handles' with multiple parameters and using it wherever required
4: Others ?
Is there a limit to the extent 'handles' can be populated with user data in a gui in matlab, ie is it advisable to keep populating the same structure(handles or user-defined) with any number of parameters

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Stephen23
Stephen23 2018-2-20
编辑：Stephen23 2018-2-20
I recommend using nested functions: simple, intuitive, easy to debug. See my FEX submission iregexp for an example of this:
https://www.mathworks.com/matlabcentral/fileexchange/48930-interactive-regular-expression-tool
Note how it combines nested functions, local functions, several callbacks, and no globals anywhere!

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