Deleting a certain base variable, from a function

I'm writing a program with user inputs, split into sub functions, I want to be able to redo a certain part of the program, without running the whole program again.

At the start of the sub function I'd like to delete the previous set variable, which is a matrix array. But clear x, clearvars x doesn't work for me :(

Any ideas?

Thanks in advance!

Answer 1

[Walter Roberson]

evalin('base', 'clear x');