4036 |
24 Jan 21 |
peter |
// $Id$ |
4036 |
24 Jan 21 |
peter |
2 |
|
4036 |
24 Jan 21 |
peter |
3 |
/* |
4036 |
24 Jan 21 |
peter |
Copyright (C) 2021 Peter Johansson |
4036 |
24 Jan 21 |
peter |
5 |
|
4036 |
24 Jan 21 |
peter |
This file is part of the yat library, http://dev.thep.lu.se/yat |
4036 |
24 Jan 21 |
peter |
7 |
|
4036 |
24 Jan 21 |
peter |
The yat library is free software; you can redistribute it and/or |
4036 |
24 Jan 21 |
peter |
modify it under the terms of the GNU General Public License as |
4036 |
24 Jan 21 |
peter |
published by the Free Software Foundation; either version 3 of the |
4036 |
24 Jan 21 |
peter |
License, or (at your option) any later version. |
4036 |
24 Jan 21 |
peter |
12 |
|
4036 |
24 Jan 21 |
peter |
The yat library is distributed in the hope that it will be useful, |
4036 |
24 Jan 21 |
peter |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
4036 |
24 Jan 21 |
peter |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
4036 |
24 Jan 21 |
peter |
General Public License for more details. |
4036 |
24 Jan 21 |
peter |
17 |
|
4036 |
24 Jan 21 |
peter |
You should have received a copy of the GNU General Public License |
4036 |
24 Jan 21 |
peter |
along with yat. If not, see <http://www.gnu.org/licenses/>. |
4036 |
24 Jan 21 |
peter |
20 |
*/ |
4036 |
24 Jan 21 |
peter |
21 |
|
4036 |
24 Jan 21 |
peter |
22 |
#include <config.h> |
4036 |
24 Jan 21 |
peter |
23 |
|
4036 |
24 Jan 21 |
peter |
24 |
#include "PercentileConfidenceInterval.h" |
4036 |
24 Jan 21 |
peter |
25 |
|
4036 |
24 Jan 21 |
peter |
26 |
#include <cassert> |
4036 |
24 Jan 21 |
peter |
27 |
|
4036 |
24 Jan 21 |
peter |
28 |
namespace theplu { |
4036 |
24 Jan 21 |
peter |
29 |
namespace yat { |
4036 |
24 Jan 21 |
peter |
30 |
namespace statistics { |
4036 |
24 Jan 21 |
peter |
31 |
|
4036 |
24 Jan 21 |
peter |
32 |
PercentileConfidenceInterval::PercentileConfidenceInterval(double k, |
4036 |
24 Jan 21 |
peter |
33 |
double level) |
4036 |
24 Jan 21 |
peter |
34 |
: alpha_(1.0-level), k_(k), n_(0) |
4036 |
24 Jan 21 |
peter |
35 |
{} |
4036 |
24 Jan 21 |
peter |
36 |
|
4036 |
24 Jan 21 |
peter |
37 |
|
4036 |
24 Jan 21 |
peter |
38 |
double PercentileConfidenceInterval::alpha(void) const |
4036 |
24 Jan 21 |
peter |
39 |
{ |
4036 |
24 Jan 21 |
peter |
40 |
return alpha_; |
4036 |
24 Jan 21 |
peter |
41 |
} |
4036 |
24 Jan 21 |
peter |
42 |
|
4036 |
24 Jan 21 |
peter |
43 |
|
4036 |
24 Jan 21 |
peter |
44 |
double PercentileConfidenceInterval::lower(void) const |
4036 |
24 Jan 21 |
peter |
45 |
{ |
4036 |
24 Jan 21 |
peter |
46 |
return lower_; |
4036 |
24 Jan 21 |
peter |
47 |
} |
4036 |
24 Jan 21 |
peter |
48 |
|
4036 |
24 Jan 21 |
peter |
49 |
|
4036 |
24 Jan 21 |
peter |
50 |
double PercentileConfidenceInterval::k(void) const |
4036 |
24 Jan 21 |
peter |
51 |
{ |
4036 |
24 Jan 21 |
peter |
52 |
return k_; |
4036 |
24 Jan 21 |
peter |
53 |
} |
4036 |
24 Jan 21 |
peter |
54 |
|
4036 |
24 Jan 21 |
peter |
55 |
|
4036 |
24 Jan 21 |
peter |
56 |
void PercentileConfidenceInterval::prepare(size_t n) |
4036 |
24 Jan 21 |
peter |
57 |
{ |
4036 |
24 Jan 21 |
peter |
58 |
if (n == n_) |
4036 |
24 Jan 21 |
peter |
59 |
return; |
4036 |
24 Jan 21 |
peter |
// number of observations, x, smaller than the kth percentile is an |
4036 |
24 Jan 21 |
peter |
// obervatioon from a Binomal distribution, Bin(n, 0.01*k) |
4036 |
24 Jan 21 |
peter |
62 |
boost::math::binomial bin(n,0.01*k_); |
4036 |
24 Jan 21 |
peter |
63 |
|
4036 |
24 Jan 21 |
peter |
// P(x <= lower_index) <= alpa/2 |
4036 |
24 Jan 21 |
peter |
65 |
lower_index_ = boost::math::quantile(bin, alpha_/2.0); |
4036 |
24 Jan 21 |
peter |
// P(x >= upper_index) <= alpa/2 |
4036 |
24 Jan 21 |
peter |
67 |
upper_index_ = boost::math::quantile(bin, 1.0 - alpha_/2.0); |
4036 |
24 Jan 21 |
peter |
68 |
n_ = n; |
4036 |
24 Jan 21 |
peter |
69 |
} |
4036 |
24 Jan 21 |
peter |
70 |
|
4036 |
24 Jan 21 |
peter |
71 |
|
4036 |
24 Jan 21 |
peter |
72 |
double PercentileConfidenceInterval::upper(void) const |
4036 |
24 Jan 21 |
peter |
73 |
{ |
4036 |
24 Jan 21 |
peter |
74 |
return upper_; |
4036 |
24 Jan 21 |
peter |
75 |
} |
4036 |
24 Jan 21 |
peter |
76 |
|
4036 |
24 Jan 21 |
peter |
77 |
|
4036 |
24 Jan 21 |
peter |
78 |
}}} // of namespace statistics, yat, and theplu |