Allow clearing functions from memory
munlock unlocks the currently running .m or .mex function in memory so that subsequent clear functions can remove it.
munlock fun unlocks the .m or .mex file named fun from memory. By default, these files are unlocked so that changes to the file are picked up. Calls to munlock are needed only to unlock .m or .mex functions that have been locked with mlock.
The function testfun begins with an mlock statement.
function testfun mlock . .
When you execute this function, it becomes locked in memory. You can check this using the mislocked function.
testfun mislocked testfun ans = 1
Using munlock, you unlock the testfun function in memory. Checking its status with mislocked shows that it is indeed unlocked at this point.
munlock testfun mislocked testfun ans = 0