MATLAB Function Reference

mlock - Prevent clearing M-file or MEX-file from memory

Syntax

mlock

mlock locks the currently running M-file or MEX-file in memory so that subsequent clear functions do not remove it.

Use the munlock function to return the file to its normal, clearable state.

Locking an M-file or MEX-file in memory also prevents any persistent variables defined in the file from getting reinitialized.

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