Method uncompress

include/Eigen/Eigen/src/SparseCore/SparseMatrix.h:624–632

Turns the matrix into the uncompressed mode */

    /** Turns the matrix into the uncompressed mode */
    void uncompress()
    {
      if (!isCompressed()) return;
      m_innerNonZeros = internal::conditional_aligned_new_auto<StorageIndex, true>(m_outerSize);
      if (m_outerIndex[m_outerSize] == 0)
        std::fill_n(m_innerNonZeros, m_outerSize, StorageIndex(0));
      else
        for (Index j = 0; j < m_outerSize; j++) m_innerNonZeros[j] = m_outerIndex[j + 1] - m_outerIndex[j];
    }

    /** Suppresses all nonzeros which are \b much \b smaller \b than \a reference under the tolerance \a epsilon */
    void prune(const Scalar& reference, const RealScalar& epsilon = NumTraits<RealScalar>::dummy_precision())