MATLAB Function Reference

mlock

Prevent M-file clearing

Syntax

• mlock
  

Description

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

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

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

Examples

The function testfun begins with an mlock statement.

• function testfun
  mlock
    .
    .
  

When you execute this function, it becomes locked in memory. This can be checked 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
  

See Also

mislocked, munlock, persistent

mkpp

mod