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
−1
0
1
2
−2
−1
0
1
2
−2
−1
0
1
2
time (in sec)
time (in sec)
Amplitude
FIGURE 4.42
Plots of part c of Example 4.4.
CRC_47760_CH004.indd 392
CRC_47760_CH004.indd 392
7/28/2008 12:26:10 PM
7/28/2008 12:26:10 PM