这句MATLAB是什么意思

329698914

for i=1:n
3 G9 n/ o' N9 n; v' Z    cta(i)=angle(B2(i,3));
    U(i)=abs(B2(i,3));
    %V(i)=B2(i,4);
end
; n+ ^1 }& M+ [7 h! ffor i=1:n
    S(i)=B2(i,1)-B2(i,2);
    B(i,i)=B(i,i)+B2(i,5);
end
. ^' b/ R- @9 p4 oP=real(S);Q=imag(S);
B2怎么给值