- Matrix A, B. What’s A(B)?
1. Elements of B are logical.
A =[1 2; 3 4]
1 2
3 4
B = [1 0; 1 0]
1 0
1 0
A(B) =
1 0
3 0
2. Elements of B are positive integers.
B = [1 1;2 2]
A(B) =
1 1
3 3
- Matrix A is x dimension A(:,:,:…), how to copy A to matrix B(n,:,:,:,…)’s first dimension B(1,:,:,:…)?
d = size(A);
B = zeros([n size(A)]);
B( 1, : ) = A( : );
