如何用matlab求矩阵的特征多项式和特征值啊,例如我生成的是一个4阶魔术矩阵

>> magic(4)ans =16 2 3 135 11 10 89 7 6 124 14 15 1>> [d,v]=eig(ans)d =-0.5000 -0.8236 0.3764 -0.2236-0.5000 0.4236 0.0236 -0.6708-0.5000 0.0236 0.4236 0.6708-0.5000 0.3764 -0.8236 0.2236v =34.0000 0 ...