Most of MATLAB toolboxes and functions send most of their data between function this way. For instance, the GUIDE toolbox puts everything between handle functio

Most of MATLAB toolboxes and functions send most of their data between function this way. For instance, the GUIDE toolbox puts everything between handle functions and structure variables. If you wanted the button to look a certain way, all the information can be stored in one variable. For example (this is just an dummy example, I can't recall the exact syntax right now for GUIDE), the button variable will be: button1.color = 'blue', button1.size= [150,200], button1.position = [200,325], etc... Therefore when you only need to input and return one variable (Button1) for each element. It's a really convenient way to keep track of your variables.