Engineering Fundamentals: An Introduction to Engineering, 4th ed.c

vehicle, you not only have to specify how fast it is moving (speed), but also its direction. The

physical variables that possess both magnitude and direction are calledvectors.

There are also other quantities that require specifying more than two pieces of information.

For example, if you were to describe the location of a car parked in a multi-story garage (with re-

spect to the garage entrance), you would need to specify the floor (thezcoordinate), and then

the location of the car on that floor (xandycoordinates). Amatrixis often used to describe

situations that require many values. In general, a matrix is an array of numbers, variables, or ma-

thematical terms. To define the elements of a matrix, for example [A]  ,

you type

A = [1 5 0;8 3 7;6 2 9]

£

150

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629

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464 Chapter 15 MATLAB

TABLE 15.1 MATLAB’s Basic Scalar (Arithmetic) Operators

Example:

Operation Symbol x5 and y 3 Result

Addition  xy8

Subtraction  xy2

Multiplication * x*y 15

Division / (xy) /2 4

Raised to a power ^ x^2 25

■Figure 15.2

Examples of assigning values or

defining elements of a matrix

in MATLAB.

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