7-19  ʹsymֵתΪž
⣺Enterȷϡ
>> M=[19 1 2 4;6 1 7 8;9 2 16 3;3 43 2 0]
M =
    19     1     2     4
     6     1     7     8
     9     2    16     3
     3    43     2     0
>> S=sym(M)
 S =
 [ 19,  1,  2,  4]
[  6,  1,  7,  8]
[  9,  2, 16,  3]
[  3, 43,  2,  0]
>>
