Programming and Graphics

348 Introduction to C++ Programming and Graphics

clear Clear variables and functions from memory

demo Run demos

exit Terminate aMatlabsession

help On-line documentation

load Retrieve variables from a specified directory

save Save workspace variables to a specified directory

saveas Save figure or model using a specified format

size Reveal the size of matrix

who List current variables

quit Terminate aMatlabsession

Table F.3.1General utilityMatlabcommands.

The commandclearis especially important, as it resets all variables to the
“uninitialized” status, and thereby prevents the use of improper values defined
or produced in a previous calculation. A detailed explanation of this command
can be obtained by typinghelp clear.

F.4 Elementaryexamples.........................

In the following examples, we demonstrate the interactive usage ofMatlabwith
simple sessions. A line beginning with two “greater than” signs (>>) denotes
theMatlabcommand line where we enter a definition or issue a statement.
Unless stated otherwise, a line that does not begin with>>isMatlabout-
put. Recall that the commandclearclears the memory from previous data to
prevent misappropriation.

• Numerical value assignment and addition:

>>a=1

a=

1

>>b=2

b=

2

>>c=a+b

c=

3