已知A矩阵为: 4 20 12 8 3 15 7 40 8 22 12 36 11 30 18 46 将矩阵转变为对称矩阵 4 20 12 8 20 15 7 40 12 7 12 36 8 40 36 46
a=[4,20,12,8;3,15,7,40;8,22,12,36;11,30,18,46]; b=triu(a,0)+tril(a',-1); disp(num2str(b));