6- 47  Ĳɾ
>> A=ones(4)

A =

     1     1     1     1
     1     1     1     1
     1     1     1     1
     1     1     1     1
>>
һ4׾A
>> A(3,:)=[]
A =
     1     1     1     1
     1     1     1     1
     1     1     1     1
>>
ʱѾɾ˾Aĵ3С
>> A([2,3],2)=[]
???  Indexed empty matrix assignment is not allowed.
>>
