Method SparseMatrix

src/util/sparse_matrix.h:27–27

 public:
  USING_MATRIX;
  SparseMatrix() { }
  SparseMatrix(
      const MatrixInfo& info, SArray<size_t> offset, SArray<I> index, SArray<V> value)
      : Matrix<V>(info, value), offset_(offset), index_(index) {