M.replaceColumn(1, v);
assertEquals(4, M.elementSum(), 0.01);
assertEquals(14, M.elementSquaredSum(), 0.01);
assertEquals(-1, M.elementMin(), 0.01);
assertEquals(3, M.elementMax(), 0.01);
assertEquals(3, M.nonZeroCount());
SparseRowMatrix N = SparseRowMatrix.create(3,3);
v=Vector.of(4,5,6);
N.replaceRow(1, v);