麻烦各位大神帮助为什么A没有被定义?

麻烦各位大神帮助为什么A没有被定义?E=0.001;Max=2;F=[0.5 0.7 0.2;0.3 0.5 0.6;0.8 0.4 0.5];N=size(F);r=sum(F');for i=1:N(1)for j=1:N(2)R(i,j)=(r(i)-r(j))/(2*N(1))+0.5;endendE=R./R';W=sum('R)./sum(sum(R));>> for i=1:N(1)S(i)=R(i,1);for j=2:N(2)S(i)=S(i)*R(i,j);endend>> S=S.^(1/N(1));>> W=S./sum(S);>> V(:,i+1)=W'/max(abs(W));>> for i=1:MaxV(:,i+1)=E*V(:,i);V(:,i+1)=V(:,i+1)/max(abs(V(:,i+1)));if max(abs(V(:,i+1)-V(:,i)))