% It is important to run "clear functions",
% as foo.mexw64 or something similar 
% may not be updated during compilation, 
% since it may be locked by matlab.
% Similarly, if you want to delete *.mexw64,
% or similar files, you need to run "clear functions".
clear functions;
compile();

a = 0:50;
b = 100:150;

output = foo(a,b);

output