PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

380 Practical MATLAB® Applications for Engineers

Plots of square wave approximations using harmonics

0.8

0.6

0.2

0

−0.2

−0.4

−0.6

−0.8

0.4

Amplitude

0 0.5 1 1.5^2 2.5 3 3.5^4

time (in sec)

FIGURE 4.31
(See color insert following page 374.) Plots of part d of Example 4.1.

error1(t) = square wave-harmonics:1

error5(t) = square wave-harmonics:1,3,5

error3(t) = square wave-harmonics:1,3

error7(t) = square wave-harmonics:1,3,5,7

0.6

0.4

0.2

0

−0.2

−0.4

Amplitude Amplitude

Amplitude

0.6

0.4

0.2

0

−0.2

−0.4

0 1 2 3 4 012 3 4

0.6

0.4

0.2

−0.2

−0.4

0

0 1 2 3 4

time (in sec)

0.6

0.4

0.2

−0.2

−0.4

0

(^01234)
time (in sec)
square wave square wave
square wave
square wave
FIGURE 4.32
Plots of part e of Example 4.1.