2013西北大学数学建模竞赛(陈思、李瑶、张瑜)(9)

end for i=1:inn ps(i)=f(i)/fsum; p(1)=ps(1); for i=2:inn p(i)=p(i-1)+ps(i); end p=p'; end;

inn=size(p,1); for i=1:2 r=rand; prand=p-r; j=1;

while prand(j)<0 j=j+1; end

seln(i)=j; end

sel1=seln(1); sel2=seln(2); end}

{ A=s(sel1,:); B=s(sel2,:); c=find(A==0); d=find(B==0); a=sym(A); b=sym(B); k=size(a,2); for i=1:size(a,2) for j=1:k

e(i,c(k))=a(i+k-1); end end

for i=1:size(a,2) for j=1:k

e(i,d(k))=b(i+k-1);