540
Practical MATLAB
® Applications for Engineers
−3
−2
−1
0
Phase
1
2
0
0.002
0.004
Magnitude
0.006
0.008
0.01
−2
−1
−1
−0.8 −0.6 −0.4 −0.2
0
0.2
angle[DFT[f(n)]] versus w
abs[DFT[f(n)]] versus w
0.4
0.6
0.8
1
0
1
2
3
frequency w
× 10
4
× 10
4
FIGURE 5.53
Plot of DFT[f(n)] of Example 5.12.
−1
−1000 −800
0.8
0.6
0.4
Magnitude
0.2
0
−600 −400 −200
0
angle[FT[f(t)]] versus w
abs[FT[f(t)]] versus w
200
400
600
800 1000
−2
−1
0
Phase
1
2
−0.8 −0.6
−0.4 −0.2
0
frequency w
× 10
4
0.2
0.4
0.6
0.8
1
FIGURE 5.54
Plot of FT[ f(t)] of Example 5.12.
CRC_47760_CH005.indd 540
CRC_47760_CH005.indd 540
7/23/2008 1:47:39 PM
7/23/2008 1:47:39 PM