How can i can convert A matrix to the type i want

For example i have a matrix

1 0 1 1 0
1 1 0 0 1
0 1 0 1 1
1 1 0 0 1
0 1 0 0 1 

and i want when i=j that time be zero briefly i want become
0 0 1 1 0
1 0 0 0 1
0 1 0 1 1
1 1 0 0 1
0 1 0 0 0

how can i write code for it If my matrix name A

Answer 1

[Honglei Chen]

A(1:size(A,1)+1:end) = 0

Answer 2

[Andrei Bobrov]

I=[1 0 1 1 0
1 1 0 0 1
0 1 0 1 1
1 1 0 0 1
0 1 0 0 1];

I(1:size(I,1)+1:end) = 0;

or

I(eye(size(I))>0) = 0;

[Andrei Bobrov]

if size(I,1) < size(I,2)-2

>> I = ones(4,8)
I =
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
>> I1 = I;
I1(1:size(I,1)+1:end) = 0
I1 =
     0     1     1     1     1     0     1     1
     1     0     1     1     1     1     0     1
     1     1     0     1     1     1     1     0
     1     1     1     0     1     1     1     1
>> I2 = I;
I2(eye(size(I))>0) = 0
I2 =
     0     1     1     1     1     1     1     1
     1     0     1     1     1     1     1     1
     1     1     0     1     1     1     1     1
     1     1     1     0     1     1     1     1
>>

Answer 3

[Sean de Wolski]

A = [1 0 1 1 0
1 1 0 0 1
0 1 0 1 1
1 1 0 0 1
0 1 0 0 1 ]

A(1:(size(A,1)+1):end) = 0

Answer 4

[Honglei Chen]

Here is another one

A.*~eye(size(A))