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4569a895 AT |
1 | // -*- C++ -*- |
2 | ||
3 | // Copyright (C) 2005, 2006 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 2, 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 COPYING. If not, write to | |
18 | // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
19 | // MA 02111-1307, USA. | |
20 | ||
21 | // As a special exception, you may use this file as part of a free | |
22 | // software library without restriction. Specifically, if other files | |
23 | // instantiate templates or use macros or inline functions from this | |
24 | // file, or you compile this file and link it with other files to | |
25 | // produce an executable, this file does not by itself cause the | |
26 | // resulting executable to be covered by the GNU General Public | |
27 | // License. This exception does not however invalidate any other | |
28 | // reasons why the executable file might be covered by the GNU General | |
29 | // Public License. | |
30 | ||
31 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
32 | ||
33 | // Permission to use, copy, modify, sell, and distribute this software | |
34 | // is hereby granted without fee, provided that the above copyright | |
35 | // notice appears in all copies, and that both that copyright notice | |
36 | // and this permission notice appear in supporting documentation. None | |
37 | // of the above authors, nor IBM Haifa Research Laboratories, make any | |
38 | // representation about the suitability of this software for any | |
39 | // purpose. It is provided "as is" without express or implied | |
40 | // warranty. | |
41 | ||
42 | /** | |
382a1351 | 43 | * @file result_recorder.hpp |
4569a895 AT |
44 | * Contains a class for recording results |
45 | */ | |
46 | ||
47 | #ifndef PB_DS_RES_RECORDER_HPP | |
48 | #define PB_DS_RES_RECORDER_HPP | |
49 | ||
50 | #include <statistic/sample_mean.hpp> | |
382a1351 | 51 | #include <statistic/sample_variance.hpp> |
4569a895 AT |
52 | #include <statistic/sample_mean_confidence_checker.hpp> |
53 | ||
54 | namespace pb_ds | |
55 | { | |
4569a895 AT |
56 | namespace test |
57 | { | |
4569a895 AT |
58 | namespace detail |
59 | { | |
4569a895 AT |
60 | /* |
61 | * Records results until the probability that the sample mean is 10% away | |
382a1351 | 62 | * from the true mean is ~ 0.05. |
4569a895 | 63 | */ |
382a1351 BK |
64 | template<typename Value_Type> |
65 | class result_recorder | |
4569a895 AT |
66 | { |
67 | public: | |
68 | typedef Value_Type value_type; | |
69 | ||
382a1351 BK |
70 | result_recorder() |
71 | : m_sample_mean(value_type()), m_sample_var(value_type()) | |
72 | { } | |
4569a895 AT |
73 | |
74 | bool | |
382a1351 | 75 | add_result(value_type res); |
4569a895 AT |
76 | |
77 | inline value_type | |
382a1351 BK |
78 | get_sample_mean() const |
79 | { return m_sample_mean; } | |
4569a895 AT |
80 | |
81 | private: | |
382a1351 | 82 | typedef std::list<value_type> list_type; |
4569a895 | 83 | |
382a1351 | 84 | list_type m_l; |
4569a895 | 85 | value_type m_sample_mean; |
4569a895 AT |
86 | value_type m_sample_var; |
87 | }; | |
88 | ||
4569a895 | 89 | |
382a1351 | 90 | template<typename Value_Type> |
4569a895 | 91 | bool |
382a1351 BK |
92 | result_recorder<Value_Type>:: |
93 | add_result(value_type res) | |
4569a895 AT |
94 | { |
95 | m_l.push_back(res); | |
382a1351 BK |
96 | m_sample_mean = sample_mean(m_l.begin(), m_l.end()); |
97 | m_sample_var = sample_variance(m_l.begin(), m_l.end(), m_sample_mean); | |
4569a895 | 98 | |
382a1351 BK |
99 | size_t dist = std::distance(m_l.begin(), m_l.end()); |
100 | return sample_mean_confidence_checker(m_sample_mean, m_sample_var, | |
101 | dist, 0.1); | |
4569a895 | 102 | } |
4569a895 | 103 | } // namespace detail |
4569a895 | 104 | } // namespace test |
4569a895 AT |
105 | } // namespace pb_ds |
106 | ||
382a1351 | 107 | #endif |
4569a895 | 108 |