6-38 ļֵ֤
⣺Enterȷϡ
>> M=magic(4)
M =
    16     2     3    13
     5    11    10     8
     9     7     6    12
     4    14    15     1
>> T=trace(M)
T =
    34
>> T1=eig(M)
T1 =
   34.0000
    8.9443
   -8.9443
    0.0000
>> T2=65-21-13+21+13
T2 =
    65
>>
