S = sparse(A) converts a full matrix into sparse form by squeezing out any zero elements. If a matrix contains many zeros, converting the matrix to sparse storage saves memory. S = sparse(m,n) generates an m-by-n all zero sparse matrix.
Executive Order 9066 was a United States presidential executive order signed and issued during World War II by the United States President Franklin D. Roosevelt on February 19, 1942, authorizing the Secretary of War to prescribe certain areas as military zones.
Executive Order 13765. Executive Order 13765 is the first executive order signed by U.S. President Donald Trump on January 20, 2017, which set out interim procedures in anticipation of repeal of Obamacare, though plans to repeal Obamacare have subsequently been shelved.