Method q3

pose_graph/include/utils/Accumulator.h:129–132

------------------------------------------------------------------------ */ Third quartile.

  /* ------------------------------------------------------------------------ */
  // Third quartile.
  inline SumType q3() const {
    CHECK_GT(samples_.size(), 0);
    return samples_.at(std::ceil(samples_.size() * 3 / 4) - 1);
  }

  /* ------------------------------------------------------------------------ */
  SumType LazyVariance() const {