clear - remove items from workspace, freeing up system memory

% clear a single variable/function a

Syntax: clear a

% clear a list of variables/functions

Syntax: clear a b c d e

% clear everything

Syntax: clear

    或者 clear all

clc - CLear Command window, i.e. clears all input and output from the Command Window display. It does not clear any variable or function.

home - moves the cursor to the upper-left conner of the Command Window. It gives more space for display in the Command Window without clear anything.

close - deletes the current figure or specificed figures.

% delete the current figure

Syntax: close

% delete the figure f

Syntax: close f

% delete all non-hidden figures

Syntax: close all