MATLAB: How to copy anti diagonal elements to another matrix

anti diagonal couple of actions two matrix

Hello, I need to copy both diagonals from one matrix to another. For example:
If (i==j or i==n+1-j) : MatA(i,j)=MatB(i,j);
else: MatA(i,j)=MatB(i,j)+1;
Thanks

Best Answer

Here is a simple solution using linear indexing. It assumes that both matrices are square and the same size.
>> A = randi(8,5)
A =
   8   3   3   5   6
   6   3   7   4   5
   4   7   5   4   2
   4   8   7   7   1
   6   6   6   3   1
>> N = numel(A);
>> R = size(A,1);
>> V = [1:R+1:N,R:R-1:N];
>> B = A+1;
>> B(V) = A(V)
B =
   8   4   4   6   6
   7   3   8   4   6
   5   8   5   5   3
   5   8   8   7   2
   6   7   7   4   1
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