matlab pack 清理内存

     PACK   Consolidate workspace memory.

    PACK performs memory garbage collection. Extended MATLAB sessions may cause memory to become fragmented, preventing large variables from being stored. PACK       is a command that saves all variables on disk, clears the memory, and the  reloads the variables.

    The following lines of code will help you 
    accomplish the consolidation of workspace memory.

        cwd = pwd;

            cd(tempdir);
            pack
            cd(cwd)