MATLAB: Quickie, global variables and sub functions.

MATLABvariables

Hi,
I have a primary function set with 12 global variables I want the sub-functions to use, they are only double constants held during a loop.
Apart from being typing lazy (copy/past) and prob bad programming, is there any programming problem or reason why I should not declare a global variable in a sub-function that is not used?
Thanks
AD

Best Answer

The variables should be passed to the functions as arguments, using global variables always introduce problems that are hard to debug, also if you declare a variable on a function you can access the same variable in every sub-function of that function.
Now for your question, besides the use of global variables and that sub-function that's not used?! I don't see any other problem