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;

N2=15;

for i=1:pi+1
   if 0.4*pi+1<=x(i)+1 && x(i)+1<=0.6*pi+1
   phi_2(i)=(N2-N1)*x(i)+1/2;
' r. }$ Z! d% _   end
: I/ m# e* L6 o9 O2 i5 y) |    if 0.0*pi+1<=x(i)+1 && x(i)+1<=0.2*pi+1
" h! j5 a  K' F+ h8 H1 ?    phi_2(i)=((N2-N1)*x(i)+1+pi)*0.5;
0 R8 t9 b' v6 I) f
    end
end

syms i;
. `. d% F$ F. G2 [# O, UEr=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