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88 lines
2.0 KiB
88 lines
2.0 KiB
// (C) Copyright John Maddock 2005-2006. |
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// Use, modification and distribution are subject to the |
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// Boost Software License, Version 1.0. (See accompanying file |
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_MATH_TOOLS_STATS_INCLUDED |
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#define BOOST_MATH_TOOLS_STATS_INCLUDED |
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#ifdef _MSC_VER |
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#pragma once |
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#endif |
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#include <boost/config/no_tr1/cmath.hpp> |
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#include <boost/cstdint.hpp> |
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#include <boost/math/tools/precision.hpp> |
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namespace boost{ namespace math{ namespace tools{ |
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template <class T> |
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class stats |
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{ |
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public: |
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stats() |
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: m_min(tools::max_value<T>()), |
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m_max(-tools::max_value<T>()), |
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m_total(0), |
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m_squared_total(0), |
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m_count(0) |
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{} |
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void add(const T& val) |
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{ |
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if(val < m_min) |
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m_min = val; |
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if(val > m_max) |
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m_max = val; |
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m_total += val; |
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++m_count; |
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m_squared_total += val*val; |
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} |
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T min BOOST_PREVENT_MACRO_SUBSTITUTION()const{ return m_min; } |
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T max BOOST_PREVENT_MACRO_SUBSTITUTION()const{ return m_max; } |
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T total()const{ return m_total; } |
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T mean()const{ return m_total / static_cast<T>(m_count); } |
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boost::uintmax_t count()const{ return m_count; } |
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T variance()const |
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{ |
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BOOST_MATH_STD_USING |
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T t = m_squared_total - m_total * m_total / m_count; |
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t /= m_count; |
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return t; |
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} |
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T variance1()const |
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{ |
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BOOST_MATH_STD_USING |
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T t = m_squared_total - m_total * m_total / m_count; |
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t /= (m_count-1); |
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return t; |
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} |
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T rms()const |
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{ |
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BOOST_MATH_STD_USING |
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return sqrt(m_squared_total / static_cast<T>(m_count)); |
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} |
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stats& operator+=(const stats& s) |
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{ |
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if(s.m_min < m_min) |
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m_min = s.m_min; |
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if(s.m_max > m_max) |
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m_max = s.m_max; |
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m_total += s.m_total; |
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m_squared_total += s.m_squared_total; |
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m_count += s.m_count; |
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return *this; |
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} |
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private: |
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T m_min, m_max, m_total, m_squared_total; |
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boost::uintmax_t m_count; |
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}; |
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} // namespace tools |
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} // namespace math |
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} // namespace boost |
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#endif |
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