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;
+ K3 I; R$ X& v% k8 AN1=13;

. W, D; |5 a  @7 D1 _7 l0 `N2=15;

for i=1:pi+1
% H0 L: y7 M. @( P   if 0.4*pi+1<=x(i)+1 && x(i)+1<=0.6*pi+1
4 B+ c) d& ?5 F4 N   phi_2(i)=(N2-N1)*x(i)+1/2;
   end
    if 0.0*pi+1<=x(i)+1 && x(i)+1<=0.2*pi+1
2 R3 u5 {+ W3 k4 c    phi_2(i)=((N2-N1)*x(i)+1+pi)*0.5;
3 T8 ?6 P& b, b7 y
- A# v2 i6 ?6 B& N& s    end
6 Y3 j2 k" `% N( y. }6 o% s  f, |end

syms i;
" w! c. y6 _& W, m+ p( nEr=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);

+ d; O% ^, E1 I

loveeatmore

是同行，只是我是菜鸟