Page 63 - MATLAB an introduction with applications
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48 ——— MATLAB: An Introduction with Applications
dn3=202
>> dn1=polyval(d,[–1])
dn1= 8
(c) >> Hn10=nn10/dn10
Hn10=–0.1256
>> Hn5=nn5/dn5
Hn5=–0.0278
>> Hn3=nn3/dn3
Hn3=–0.2228
>> Hn1=nn1/dn1
Hn1=–0.1250
Example E1.8: Generate a plot of
y(x) = e –0.7x sin ωx
where ω = 15 rad/s, and 0 ≤ x ≤ 15. Use the colon notation to generate the x vector in increments of 0.1.
Solution:
>> x=[0:0.1:15];
>> w=15;
>> y=exp(–0.7*x)*sin(w*x);
>> plot(x,y)
>> title(‘y(x)=e^–^0^.^7^xsin\omegax’)
>> xlabel(‘x’)
>> ylabel(‘y’)
() =
yx e − 0.7 x sin ωx
1
0.8
0.6
0.4
0.2
y
0
–0.2
–0.4
–0.6
–0.8
0 5 10 15
x
Fig. E1.8
F:\Final Book\Sanjay\IIIrd Printout\Dt. 10-03-09
