clear (MATLAB Function Reference)

Remove items from memory

clear
clear name
clear name1 name2 name3 
clear global name





clear keyword


where keyword is one of:





functions 

variables


mex


global


all

clear `keyword`	where `keyword` is one of:		functions variables mex global all

Description

clear,

by itself, clears all variables from the workspace.

clear name

removes just the M-file or MEX-file function or variable name from the workspace. A MATLABPATH relative partial pathname is permitted. If name is global, it is removed from the current workspace, but left accessible to any functions declaring it global. If name has been locked by mlock, it will remain in memory.

clear name1 name2 name3

removes name1, name2, and name3 from the workspace.

clear global name

removes the global variable name.

clear keyword

clears the indicated items:


`clear functions`	Clears all the currently compiled M-functions from memory.
`clear variables`	Clears all variables from the workspace.
`clear mex`	Clears all MEX-files from memory.
`clear global`	Clears all global variables.
`clear all`	Removes all variables, functions, and MEX-files from memory, leaving the workspace empty.

Remarks

You can use wildcards (*) to remove items selectively. For instance, clear my* removes any variables whose names begin with the string "my." The function form of the syntax, clear('name'), is also permitted.

Limitations

clear doesn't affect the amount of memory allocated to the MATLAB process under UNIX.