tests/glean/stats.h

   1 // BEGIN_COPYRIGHT
   2 //
   3 // Copyright (C) 1999  Allen Akin   All Rights Reserved.
   4 //
   5 // Permission is hereby granted, free of charge, to any person
   6 // obtaining a copy of this software and associated documentation
   7 // files (the "Software"), to deal in the Software without
   8 // restriction, including without limitation the rights to use,
   9 // copy, modify, merge, publish, distribute, sublicense, and/or
  10 // sell copies of the Software, and to permit persons to whom the
  11 // Software is furnished to do so, subject to the following
  12 // conditions:
  13 //
  14 // The above copyright notice and this permission notice shall be
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  16 // Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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  27 // END_COPYRIGHT
  28
  29
  30
  31
  32 // stats.h: simple statistics-gathering utilities for glean
  33
  34 // These are rather simplistic.  For more robust implementations, consider
  35 // using Numerical Recipes.
  36
  37 #ifndef __stats_h__
  38 #define __stats_h__
  39
  40 #include <vector>
  41
  42 #ifdef __WIN__
  43 using namespace std;
  44 #endif
  45
  46 #if defined( __WIN__ )
  47
  48 #undef min
  49 #undef max
  50
  51 #endif
  52
  53 namespace GLEAN {
  54
  55 class BasicStats {
  56         int _n;
  57         double _min;
  58         double _max;
  59         double _sum;
  60         double _sum2;
  61     public:
  62         void init();
  63         inline int n() const {return _n;}
  64         inline double min() const {return _min;}
  65         inline double max() const {return _max;}
  66         inline double sum() const {return _sum;}
  67         inline double sum2() const {return _sum2;}
  68         double mean() const;
  69         double variance() const;
  70         double deviation() const;
  71         inline void sample(double d) {
  72                 ++_n;
  73                 if (d < _min)
  74                         _min = d;
  75                 if (d > _max)
  76                         _max = d;
  77                 _sum += d;
  78                 _sum2 += d*d;
  79         }
  80
  81         BasicStats() {init();}
  82         template<class T> BasicStats(std::vector<T>& v) {
  83                 init();
  84                 for (typename std::vector<T>::const_iterator p = v.begin(); p < v.end(); ++p)
  85                         sample(*p);
  86         }
  87 }; // class BasicStats
  88
  89 } // namespace GLEAN
  90
  91 #endif // __stats_h__