Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Struct variance

boost::accumulators::tag::variance

// In header: <boost/accumulators/statistics/variance.hpp>


struct variance :
  public boost::accumulators::depends_on< count, immediate_mean >
{
};