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matlab积分怎么积分? i=1:0.01:pi;) U: ^' c$ Q7 Y' w3 Z2 M- V
x=1:0.01:pi;
4 |1 J# B. j; CN1=13;0 w/ W, ?, H, ~! l$ j2 w+ F
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N2=15; for i=1:pi+1
4 X# g' P: \& e# g0 ?7 n J* ~& N7 K if 0.4*pi+1<=x(i)+1 && x(i)+1<=0.6*pi+1
- X( \5 g2 E. z9 u) D# u0 K6 x3 F phi_2(i)=(N2-N1)*x(i)+1/2;' e* b5 b8 [5 }% x+ `& X+ n( D
end
7 |, j# }1 d, a% Q7 K$ N if 0.0*pi+1<=x(i)+1 && x(i)+1<=0.2*pi+11 W$ W: X% c2 [' o; G9 C* }
phi_2(i)=((N2-N1)*x(i)+1+pi)*0.5;
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end syms i;" a! M% B( E1 d
Er=1-abs(exp(1j*(phi_2(i)-((N1+N2)/2)*i)).*cos(((N2-N1)/2)*i-phi_2(i) )).^2; s=int((Er),0.4*pi,0.6*pi);
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