Method matrix

include/Eigen/src/Core/ArrayBase.h:141–141

  /** \returns an \link Eigen::MatrixBase Matrix \endlink expression of this array
   * \sa MatrixBase::array() */
  EIGEN_DEVICE_FUNC MatrixWrapper<Derived> matrix() { return MatrixWrapper<Derived>(derived()); }
  EIGEN_DEVICE_FUNC const MatrixWrapper<const Derived> matrix() const {
    return MatrixWrapper<const Derived>(derived());
  }