113 lines
2.6 KiB
C++
113 lines
2.6 KiB
C++
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// Copyright (C) 2009-2013 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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//! \addtogroup running_stat
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//! @{
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template<typename eT>
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class arma_counter
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{
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public:
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inline ~arma_counter();
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inline arma_counter();
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inline const arma_counter& operator++();
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inline void operator++(int);
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inline void reset();
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inline eT value() const;
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inline eT value_plus_1() const;
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inline eT value_minus_1() const;
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private:
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arma_aligned eT d_count;
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arma_aligned uword i_count;
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};
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//! Class for keeping statistics of a continuously sampled process / signal.
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//! Useful if the storage of individual samples is not necessary or desired.
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//! Also useful if the number of samples is not known beforehand or exceeds
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//! available memory.
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template<typename eT>
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class running_stat
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{
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public:
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typedef typename get_pod_type<eT>::result T;
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inline ~running_stat();
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inline running_stat();
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inline void operator() (const T sample);
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inline void operator() (const std::complex<T>& sample);
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inline void reset();
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inline eT mean() const;
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inline T var (const uword norm_type = 0) const;
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inline T stddev(const uword norm_type = 0) const;
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inline eT min() const;
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inline eT max() const;
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inline T count() const;
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//
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//
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private:
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arma_aligned arma_counter<T> counter;
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arma_aligned eT r_mean;
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arma_aligned T r_var;
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arma_aligned eT min_val;
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arma_aligned eT max_val;
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arma_aligned T min_val_norm;
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arma_aligned T max_val_norm;
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friend class running_stat_aux;
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};
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class running_stat_aux
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{
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public:
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template<typename eT>
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inline static void update_stats(running_stat<eT>& x, const eT sample, const typename arma_not_cx<eT>::result* junk = 0);
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template<typename eT>
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inline static void update_stats(running_stat<eT>& x, const std::complex<eT>& sample, const typename arma_not_cx<eT>::result* junk = 0);
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template<typename eT>
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inline static void update_stats(running_stat<eT>& x, const typename eT::value_type sample, const typename arma_cx_only<eT>::result* junk = 0);
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template<typename eT>
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inline static void update_stats(running_stat<eT>& x, const eT& sample, const typename arma_cx_only<eT>::result* junk = 0);
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};
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//! @}
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