(To be removed) Consolidate workspace memory
pack will be removed in a future release. There is no replacement for
this function. For more information, see Compatibility Considerations.
pack reorganizes workspace data to maximize the size of the largest
contiguous free memory block. It consolidates fragmented memory by:
Saving all variables in the base and function workspaces to a temporary file
Clearing all variables and functions from memory
Reloading the base and function workspace variables back from the temporary file and then deleting the file
When MATLAB® runs out of memory on a 32-bit system,
find you some free memory without forcing you to delete variables. On a 64-bit system,
you do not need to use
pack. For more information about strategies
for reducing memory usage, see Strategies for Efficient Use of Memory
and Resolve “Out of Memory” Errors.
pack frees space in memory,
temporarily storing workspace data in a file specified by
Consolidate memory by running
pack in a
Change the current folder to the temporary folder for the system, run
pack, and then return to the previous folder.
cwd = pwd; cd(tempdir) pack cd(cwd)
filename — Name of file
character vector | string scalar
Name of file, specified as a character vector or string scalar. The file must be in
a folder for which you have write permission. If you do not specify
pack temporarily stores your
workspace data in a file in your temporary folder.
When using the command form of
pack, you do not need to enclose
the input in single quotes. However, if
filename contains a space,
you must enclose the argument in single quotes; for example,
Do not use command form when
filename is a string. Use function
packfunction is supported only in the Command Window. You cannot call it from a function or script.
If the workspace contains a variable larger than 2 GB,
packcannot save and reload your data.
packfunction does not affect the amount of memory allocated to the MATLAB process. You must end your MATLAB session to free up this memory.
packfunction initializes all persistent variables to an empty matrix (
). To maintain the value of persistent variables when you run
mlockin the functions in which they are declared.
Do not use the
packfunction with objects that define events and listeners.
packcauses the destruction of any listeners defined for the objects in the workspace. For information about restoring listeners when saving objects, see Restore Listeners.
Version HistoryIntroduced before R2006a
R2022a: To be removed
Warns starting in R2022a