Method coeff

unsupported/Eigen/src/SparseExtra/BlockSparseMatrix.h:181–186

      return m_spblockmat.blockRows();
    }
    inline Scalar coeff(Index bi) const
    {
      Index startRow = m_spblockmat.blockRowsIndex(bi);
      Index rowSize = m_spblockmat.blockRowsIndex(bi+1) - startRow;
      return m_vec.middleRows(startRow, rowSize);
    }
    inline Scalar coeff(Index bi, Index j) const
    {
      Index startRow = m_spblockmat.blockRowsIndex(bi);