Function prune

include/Eigen/src/SparseCore/SparseVector.h:191–193

\copydoc SparseMatrix::prune(const Scalar&,const RealScalar&) */

  /** \copydoc SparseMatrix::prune(const Scalar&,const RealScalar&) */
  Index prune(const Scalar& reference, const RealScalar& epsilon = NumTraits<RealScalar>::dummy_precision()) {
    return prune([&](const Scalar& val) { return !internal::isMuchSmallerThan(val, reference, epsilon); });
  }

  /**
   * \brief Prunes the entries of the vector based on a `predicate`