How to extract this vector ?

I have this matrix:

A=[ 1 2 -4 6
    9 7 5 9
   8 -3 7 2
   1 2 6 7]

i want to extract the vector [ 6 5 -3 1], can anyone help me ?

Answer 1

[Guillaume]

Assuming you mean the antidiagonal of the matrix:

diag(fliplr(A))