6-64  ʹsort
>> X = [1 7 5; 6 4 2;9 8 3]
X =
     1     7     5
     6     4     2
     9     8     3
>> sort(X,2)
ans =
     1     5     7
     2     4     6
     3     8     9
>>  sort(X)
ans =
     1     4     2
     6     7     3
     9     8     5
>>  [Y,I]=sort(X)
Y =
     1     4     2
     6     7     3
     9     8     5
I =
     1     2     2
     2     1     3
     3     3     1
>>
