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.
On February 19, 1942, a day of infamy as far as the Constitution is concerned, Franklin Roosevelt signed Executive Order 9066, which was the instrument by which just over 120,000 persons, two-thirds of them American citizens, were confined in concentration camps on American soil, in some cases for nearly four years.