comparison armadillo-2.4.4/include/armadillo_bits/running_stat_bones.hpp @ 0:8b6102e2a9b0

Armadillo Library

+// Copyright (C) 2009-2011 NICTA (www.nicta.com.au)
+// Copyright (C) 2009-2011 Conrad Sanderson
+// 
+// This file is part of the Armadillo C++ library.
+// It is provided without any warranty of fitness
+// for any purpose. You can redistribute this file
+// and/or modify it under the terms of the GNU
+// Lesser General Public License (LGPL) as published
+// by the Free Software Foundation, either version 3
+// of the License or (at your option) any later version.
+// (see http://www.opensource.org/licenses for more info)
+
+
+//! \addtogroup running_stat
+//! @{
+
+
+
+template<typename eT>
+class arma_counter
+  {
+  public:
+  
+  inline ~arma_counter();
+  inline  arma_counter();
+  
+  inline const arma_counter& operator++();
+  inline void                operator++(int);
+  
+  inline void reset();
+  inline eT   value()         const;
+  inline eT   value_plus_1()  const;
+  inline eT   value_minus_1() const;
+  
+  
+  private:
+  
+  arma_aligned eT    d_count;
+  arma_aligned uword i_count;
+  };
+
+
+
+//! Class for keeping statistics of a continuously sampled process / signal.
+//! Useful if the storage of individual samples is not necessary or desired.
+//! Also useful if the number of samples is not known beforehand or exceeds 
+//! available memory.
+template<typename eT>
+class running_stat
+  {
+  public:
+  
+  typedef typename get_pod_type<eT>::result T;
+  
+  
+  inline ~running_stat();
+  inline  running_stat();
+  
+  inline void operator() (const T sample);
+  inline void operator() (const std::complex<T>& sample);
+  
+  inline void reset();
+  
+  inline eT mean() const;
+  
+  inline  T var   (const uword norm_type = 0) const;
+  inline  T stddev(const uword norm_type = 0) const;
+  
+  inline eT min()  const;
+  inline eT max()  const;
+  
+  inline T count() const;
+  
+  //
+  //
+  
+  private:
+  
+  arma_aligned arma_counter<T> counter;
+  
+  arma_aligned eT r_mean;
+  arma_aligned  T r_var;
+  
+  arma_aligned eT min_val;
+  arma_aligned eT max_val;
+  
+  arma_aligned  T min_val_norm;
+  arma_aligned  T max_val_norm;
+  
+  
+  friend class running_stat_aux;
+  };
+
+
+
+class running_stat_aux
+  {
+  public:
+  
+  template<typename eT>
+  inline static void update_stats(running_stat<eT>&               x,  const eT               sample);
+  
+  template<typename T>
+  inline static void update_stats(running_stat< std::complex<T> >& x, const T                sample);
+  
+  template<typename T>
+  inline static void update_stats(running_stat< std::complex<T> >& x, const std::complex<T>& sample);
+  
+  };
+
+
+
+//! @}