例6-62  使用median函數求中位數。
>> A=linspace(1,9,9)
A =
     1     2     3     4     5     6     7     8     9
>> a=median(A)
a =
     5
>>
>> B=linspace(1,10,10)

B =
     1     2     3     4     5     6     7     8     9    10
>> a=median(B)
a =
    5.5000
>>
>> B=magic(4)
B =
    16     2     3    13
     5    11    10     8
     9     7     6    12
     4    14    15     1
>> b=median(B)
b =
     7     9     8    10
>>