1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2018 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library.  This library is free
6 // software; you can redistribute it and/or modify it under the terms
7 // of the GNU General Public License as published by the Free Software
8 // Foundation; either version 3, or (at your option) any later
9 // version.
10 
11 // This library is distributed in the hope that it will be useful, but
12 // WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 // General Public License for more details.
15 
16 // You should have received a copy of the GNU General Public License
17 // along with this library; see the file COPYING3.  If not see
18 // <http://www.gnu.org/licenses/>.
19 
20 
21 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
22 
23 // Permission to use, copy, modify, sell, and distribute this software
24 // is hereby granted without fee, provided that the above copyright
25 // notice appears in all copies, and that both that copyright notice
26 // and this permission notice appear in supporting documentation. None
27 // of the above authors, nor IBM Haifa Research Laboratories, make any
28 // representation about the suitability of this software for any
29 // purpose. It is provided "as is" without express or implied
30 // warranty.
31 
32 /**
33  * @file sample_mean.hpp
34  * Contains a function for calculating a sample mean
35  */
36 
37 #ifndef PB_DS_SAMPLE_MEAN_HPP
38 #define PB_DS_SAMPLE_MEAN_HPP
39 
40 #include <list>
41 #include <numeric>
42 #include <math.h>
43 #include <iterator>
44 
45 namespace __gnu_pbds
46 {
47   namespace test
48   {
49     namespace detail
50     {
51 #define PB_DS_VTYPE typename std::iterator_traits<It>::value_type
52 
53       template<typename It>
54       PB_DS_VTYPE
sample_mean(It b,It e)55       sample_mean(It b, It e)
56       {
57 	const PB_DS_VTYPE total = std::accumulate(b, e, PB_DS_VTYPE(0));
58 	const size_t num = std::distance(b, e);
59 	return total / num;
60       }
61 
62 #undef PB_DS_VTYPE
63 
64     } // namespace detail
65   } // namespace test
66 } // namespace __gnu_pbds
67 
68 #endif
69 
70