Checking if variable exists in GUI

Hi, in my GUI i want to check if variable m exists and if so do some stuff with it and if it doesnt exist do something else...I have solution using ishandle function but there are some problems with it and i have to make m global variable and i dont want to. Thanks for help!!

Answer 1

[Walter Roberson]

if exist('m', 'var')

Or is 'm' not in the current workspace?

[Jakub]

I have to make m global variable, which is sad. And if m is global variable , it exists but it doesnt containt any value. So one solution is to make m global variable and then instead of ifexist use isempty.