What methods do you use to bring the variable data from an external program or function into a guide GUI function file?

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Pleae share the way you manage to bring the variables(which are updated in the external program/functions)from external program/functions into a matlab gui functions.
[Meaning the GUI function is defined in a seperate file and your main function is written in another file.]

Accepted Answer

Ilham Hardy
Ilham Hardy on 24 Feb 2016
  1. Load required parameter into Matlab (base) workspace
  2. Use evalin() to load the specified parameter into the GUI.
Stephen23 on 5 Sep 2019
Edited: Stephen23 on 5 Sep 2019
"Using assignin and evalin for GUIDE is a painful process."
Which is why experienced MATLAB users do not recommend this method, nor use it themselves. As always, the most efficient way to pass data between workspaces is to use input/output arguments or nested functions.
The MATLAB documentation explains how to provide input/output arguments for GUIDE GUIs:
"What if I want to update the variables received from the external function to automatically update inside a call_back function"
You should revise your data-flow concept. Rather than making data appear in (and disappear from) other other workspaces, you should process the data within the GUI workspaces. This will be much simpler and more efficient.

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