1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // REQUIRES: long_tests
14 // template<class RealType = double>
15 // class extreme_value_distribution
17 // template<class _URNG> result_type operator()(_URNG& g, const param_type& parm);
35 typedef std::extreme_value_distribution<> D;
36 typedef D::param_type P;
37 typedef std::mt19937 G;
41 const int N = 1000000;
42 std::vector<D::result_type> u;
43 for (int i = 0; i < N; ++i)
45 D::result_type v = d(g, p);
48 double mean = std::accumulate(u.begin(), u.end(), 0.0) / u.size();
52 for (unsigned i = 0; i < u.size(); ++i)
54 double dbl = (u[i] - mean);
61 double dev = std::sqrt(var);
62 skew /= u.size() * dev * var;
63 kurtosis /= u.size() * var * var;
65 double x_mean = p.a() + p.b() * 0.577215665;
66 double x_var = sqr(p.b()) * 1.644934067;
67 double x_skew = 1.139547;
68 double x_kurtosis = 12./5;
69 assert(std::abs((mean - x_mean) / x_mean) < 0.01);
70 assert(std::abs((var - x_var) / x_var) < 0.01);
71 assert(std::abs((skew - x_skew) / x_skew) < 0.01);
72 assert(std::abs((kurtosis - x_kurtosis) / x_kurtosis) < 0.01);
78 typedef std::extreme_value_distribution<> D;
79 typedef D::param_type P;
80 typedef std::mt19937 G;
84 const int N = 1000000;
85 std::vector<D::result_type> u;
86 for (int i = 0; i < N; ++i)
88 D::result_type v = d(g, p);
91 double mean = std::accumulate(u.begin(), u.end(), 0.0) / u.size();
95 for (unsigned i = 0; i < u.size(); ++i)
97 double dbl = (u[i] - mean);
104 double dev = std::sqrt(var);
105 skew /= u.size() * dev * var;
106 kurtosis /= u.size() * var * var;
108 double x_mean = p.a() + p.b() * 0.577215665;
109 double x_var = sqr(p.b()) * 1.644934067;
110 double x_skew = 1.139547;
111 double x_kurtosis = 12./5;
112 assert(std::abs((mean - x_mean) / x_mean) < 0.01);
113 assert(std::abs((var - x_var) / x_var) < 0.01);
114 assert(std::abs((skew - x_skew) / x_skew) < 0.01);
115 assert(std::abs((kurtosis - x_kurtosis) / x_kurtosis) < 0.01);
121 typedef std::extreme_value_distribution<> D;
122 typedef D::param_type P;
123 typedef std::mt19937 G;
127 const int N = 1000000;
128 std::vector<D::result_type> u;
129 for (int i = 0; i < N; ++i)
131 D::result_type v = d(g, p);
134 double mean = std::accumulate(u.begin(), u.end(), 0.0) / u.size();
138 for (unsigned i = 0; i < u.size(); ++i)
140 double dbl = (u[i] - mean);
141 double d2 = sqr(dbl);
147 double dev = std::sqrt(var);
148 skew /= u.size() * dev * var;
149 kurtosis /= u.size() * var * var;
151 double x_mean = p.a() + p.b() * 0.577215665;
152 double x_var = sqr(p.b()) * 1.644934067;
153 double x_skew = 1.139547;
154 double x_kurtosis = 12./5;
155 assert(std::abs((mean - x_mean) / x_mean) < 0.01);
156 assert(std::abs((var - x_var) / x_var) < 0.01);
157 assert(std::abs((skew - x_skew) / x_skew) < 0.01);
158 assert(std::abs((kurtosis - x_kurtosis) / x_kurtosis) < 0.01);
164 typedef std::extreme_value_distribution<> D;
165 typedef D::param_type P;
166 typedef std::mt19937 G;
170 const int N = 1000000;
171 std::vector<D::result_type> u;
172 for (int i = 0; i < N; ++i)
174 D::result_type v = d(g, p);
177 double mean = std::accumulate(u.begin(), u.end(), 0.0) / u.size();
181 for (unsigned i = 0; i < u.size(); ++i)
183 double dbl = (u[i] - mean);
184 double d2 = sqr(dbl);
190 double dev = std::sqrt(var);
191 skew /= u.size() * dev * var;
192 kurtosis /= u.size() * var * var;
194 double x_mean = p.a() + p.b() * 0.577215665;
195 double x_var = sqr(p.b()) * 1.644934067;
196 double x_skew = 1.139547;
197 double x_kurtosis = 12./5;
198 assert(std::abs((mean - x_mean) / x_mean) < 0.01);
199 assert(std::abs((var - x_var) / x_var) < 0.01);
200 assert(std::abs((skew - x_skew) / x_skew) < 0.01);
201 assert(std::abs((kurtosis - x_kurtosis) / x_kurtosis) < 0.01);