Deleting rows and columns using the colon operator.

Assign newMatrixA with origMatrixA, then remove row delRow and column delCol from newMatrixA. Assign deletedElems with the deleted row and column values.

Ex: If origMatrixA is [1, 3, 2; 4, 9, 5; 6, 7, 8; ], delRow is 1, and delCol is 2, then newMatrix A is [ 4, 5; 6, 8; ], and deletedElems is [ 1; 3; 2; 9; 7; ].