PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

392 Practical MATLAB® Applications for Engineers

Harmonic frequencies of f(t)

first

second

third

fourth

fifth

0.8

0.6

0.2

−0.2

−0.4

−0.6

−0.8

0

0.4

Amplitude

− 2 −1.5 − 1 −0.5 0 0.5 1 1.5 2

time (in sec)

FIGURE 4.41
(See color insert following page 374.) Plots of part b of Example 4.4.

Partial sum of first 2 components (F0+F1) Partial sum of first 3 harmonics + DC

Partial sum of first 5 harmonics + DC

2

1

1.5

0.5

0

2

1

1.5

0.5

0

2

1

1.5

0.5

0

Amplitude Amplitude

− 2 − 1 0 1 2

Partial sum of first 4 harmonics + DC

2

1.5

0.5

1

0

Amplitude

− 2 − 101 2

− 2 − 1 012

− 2 − 101 2

time (in sec) time (in sec)

Amplitude

FIGURE 4.42
Plots of part c of Example 4.4.