请教matlab积分怎么积分？？？

littlestupid

matlab积分怎么积分？                         

i=1:0.01:pi;
x=1:0.01:pi;
N1=13;

( a- U( {: c4 f/ b2 UN2=15;

for i=1:pi+1
. ~9 \% p% p* \0 W. l2 e   if 0.4*pi+1<=x(i)+1 && x(i)+1<=0.6*pi+1
   phi_2(i)=(N2-N1)*x(i)+1/2;
# m2 Z" ?9 a; r2 P1 T   end
    if 0.0*pi+1<=x(i)+1 && x(i)+1<=0.2*pi+1
5 p  L8 V2 }" r# x4 f' v: w1 K    phi_2(i)=((N2-N1)*x(i)+1+pi)*0.5;
% p# B9 C8 _/ y, p/ K
' b: [/ `" o9 }8 E- S% h9 O- D' y6 D* b    end
end

syms i;
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);

loveeatmore

是同行，只是我是菜鸟