3 // Copyright Paul A. Bristow 2012.
4 // Copyright Benjamin Sobotta 2012.
6 // Use, modification and distribution are subject to the
7 // Boost Software License, Version 1.0.
8 // (See accompanying file LICENSE_1_0.txt
9 // or copy at http://www.boost.org/LICENSE_1_0.txt)
11 // Tested using some 30 decimal digit accuracy values from:
12 // Fast and accurate calculation of Owen's T-function
13 // Mike Patefield, and David Tandy
14 // Journal of Statistical Software, 5 (5), 1-25 (2000).
15 // http://www.jstatsoft.org/v05/a05/paper Table 3, page 15
16 // Values of T(h,a) accurate to thirty figures were calculated using 128 bit arithmetic by
17 // evaluating (9) with m = 48, the summation over k being continued until additional terms did
18 // not alter the result. The resultant values Tacc(h,a) say, were validated by evaluating (8) with
19 // m = 48 (i.e. 96 point Gaussian quadrature).
21 #define BOOST_MATH_OVERFLOW_ERROR_POLICY ignore_error
24 # pragma warning (disable : 4127) // conditional expression is constant
25 # pragma warning (disable : 4305) // 'initializing' : truncation from 'double' to 'const float'
26 // ?? TODO get rid of these warnings?
29 #include <boost/math/concepts/real_concept.hpp> // for real_concept.
30 using ::boost::math::concepts::real_concept;
32 #include <boost/math/special_functions/owens_t.hpp> // for owens_t function.
33 using boost::math::owens_t;
34 #include <boost/math/distributions/normal.hpp>
36 #define BOOST_TEST_MAIN
37 #include <boost/test/unit_test.hpp>
38 #include <boost/test/floating_point_comparison.hpp>
39 #include <boost/array.hpp>
41 #include "libs/math/test/handle_test_result.hpp"
42 #include "libs/math/test/table_type.hpp"
43 #include "libs/math/test/functor.hpp"
46 // Defining TEST_CPP_DEC_FLOAT enables testing of multiprecision support.
47 // This requires the multiprecision library from sandbox/big_number.
48 // Note that these tests *do not pass*, but they do give an idea of the
49 // error rates that can be expected....
51 #ifdef TEST_CPP_DEC_FLOAT
52 #include <boost/multiprecision/cpp_dec_float.hpp>
55 inline R convert_to(const char* s)
58 return boost::lexical_cast<R>(s);
60 catch(const boost::bad_lexical_cast&)
66 #define SC_(x) convert_to<T>(BOOST_STRINGIZE(x))
69 #include "owens_t_T7.hpp"
75 using std::numeric_limits;
77 void expected_results()
80 // Define the max and mean errors expected for
81 // various compilers and platforms.
83 const char* largest_type;
84 #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
85 if(boost::math::policies::digits<double, boost::math::policies::policy<> >() == boost::math::policies::digits<long double, boost::math::policies::policy<> >())
87 largest_type = "(long\\s+)?double|real_concept";
91 largest_type = "long double|real_concept";
94 largest_type = "(long\\s+)?double";
98 // Catch all cases come last:
100 if(std::numeric_limits<long double>::digits > 60)
106 largest_type, // test type(s)
107 ".*", // test data group
108 "boost::math::owens_t", 500, 100); // test function
116 largest_type, // test type(s)
117 ".*", // test data group
118 "boost::math::owens_t", 60, 5); // test function
121 // Finish off by printing out the compiler/stdlib/platform names,
122 // we do this to make it easier to mark up expected error rates.
124 std::cout << "Tests run with " << BOOST_COMPILER << ", "
125 << BOOST_STDLIB << ", " << BOOST_PLATFORM << std::endl;
129 template <class RealType>
133 RealType tol) // Test tolerance
135 BOOST_CHECK_CLOSE_FRACTION(owens_t(h, a), 3.89119302347013668966224771378e-2L, tol);
139 template <class RealType> // Any floating-point type RealType.
140 void test_spots(RealType)
142 // Basic sanity checks, test data is as accurate as long double,
143 // so set tolerance to a few epsilon expressed as a fraction.
144 RealType tolerance = boost::math::tools::epsilon<RealType>() * 30; // most OK with 3 eps tolerance.
145 cout << "Tolerance = " << tolerance << "." << endl;
147 using ::boost::math::owens_t;
148 using ::boost::math::normal_distribution;
149 BOOST_MATH_STD_USING // ADL of std names.
151 // Checks of six sub-methods T1 to T6.
152 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0.0625L), static_cast<RealType>(0.25L)), static_cast<RealType>(3.89119302347013668966224771378e-2L), tolerance); // T1
153 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(6.5L), static_cast<RealType>(0.4375L)), static_cast<RealType>(2.00057730485083154100907167685E-11L), tolerance); // T2
154 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(7L), static_cast<RealType>( 0.96875L)), static_cast<RealType>(6.39906271938986853083219914429E-13L), tolerance); // T3
155 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(4.78125L), static_cast<RealType>(0.0625L)), static_cast<RealType>(1.06329748046874638058307112826E-7L), tolerance); // T4
156 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(2.L), static_cast<RealType>(0.5L)), static_cast<RealType>(8.62507798552150713113488319155E-3L), tolerance); // T5
157 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(1.L), static_cast<RealType>(0.9999975L)), static_cast<RealType>(6.67418089782285927715589822405E-2L), tolerance); // T6
158 //BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(L), static_cast<RealType>(L)), static_cast<RealType>(L), tolerance);
160 // BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(L), static_cast<RealType>(L)), static_cast<RealType>(L), tolerance);
162 // Spots values using Mathematica
163 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(6.5L), static_cast<RealType>(0.4375L)), static_cast<RealType>(2.00057730485083154100907167684918851101649922551817956120806662022118024594547E-11L), tolerance);
164 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0.4375L), static_cast<RealType>(6.5L)), static_cast<RealType>(0.16540130125449396247498691826626273249659241838438244251206819782787761751256L), tolerance);
165 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(7.L), static_cast<RealType>(0.96875L)), static_cast<RealType>(6.39906271938986853083219914428916013764797190941459233223182225724846022843930e-13L), tolerance);
166 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0.96875L), static_cast<RealType>(7.L)), static_cast<RealType>(0.08316748474602973770533230453272140919966614259525787470390475393923633179072L), tolerance);
167 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(4.78125L), static_cast<RealType>(0.0625L)), static_cast<RealType>(1.06329748046874638058307112826015825291136503488102191050906959246644942646701e-7L), tolerance);
168 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0.0625L), static_cast<RealType>(4.78125L)), static_cast<RealType>(0.21571185819897989857261253680409017017649352928888660746045361855686569265171L), tolerance);
169 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(2.L), static_cast<RealType>(0.5L)), static_cast<RealType>(0.00862507798552150713113488319154637187875641190390854291100809449487812876461L), tolerance);
170 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0.5L), static_cast<RealType>(2L)), static_cast<RealType>(0.14158060365397839346662819588111542648867283386549027383784843786494855594607L), tolerance);
172 // check basic properties
173 BOOST_CHECK_EQUAL(owens_t(static_cast<RealType>(0.5L), static_cast<RealType>(2L)), owens_t(static_cast<RealType>(-0.5L), static_cast<RealType>(2L)));
174 BOOST_CHECK_EQUAL(owens_t(static_cast<RealType>(0.5L), static_cast<RealType>(2L)), -owens_t(static_cast<RealType>(0.5L), static_cast<RealType>(-2L)));
175 BOOST_CHECK_EQUAL(owens_t(static_cast<RealType>(0.5L), static_cast<RealType>(2L)), -owens_t(static_cast<RealType>(-0.5L), static_cast<RealType>(-2L)));
177 // Special relations from Owen's original paper:
178 BOOST_CHECK_EQUAL(owens_t(static_cast<RealType>(0.5), static_cast<RealType>(0)), static_cast<RealType>(0));
179 BOOST_CHECK_EQUAL(owens_t(static_cast<RealType>(10), static_cast<RealType>(0)), static_cast<RealType>(0));
180 BOOST_CHECK_EQUAL(owens_t(static_cast<RealType>(10000), static_cast<RealType>(0)), static_cast<RealType>(0));
182 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0), static_cast<RealType>(2L)), atan(static_cast<RealType>(2L)) / (boost::math::constants::pi<RealType>() * 2), tolerance);
183 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0), static_cast<RealType>(0.5L)), atan(static_cast<RealType>(0.5L)) / (boost::math::constants::pi<RealType>() * 2), tolerance);
184 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0), static_cast<RealType>(2000L)), atan(static_cast<RealType>(2000L)) / (boost::math::constants::pi<RealType>() * 2), tolerance);
185 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(5), static_cast<RealType>(1)), cdf(normal_distribution<RealType>(), 5) * cdf(complement(normal_distribution<RealType>(), 5)) / 2, tolerance);
186 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0.125), static_cast<RealType>(1)), cdf(normal_distribution<RealType>(), 0.125) * cdf(complement(normal_distribution<RealType>(), 0.125)) / 2, tolerance);
187 if(std::numeric_limits<RealType>::has_infinity)
189 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(0.125), std::numeric_limits<RealType>::infinity()), cdf(complement(normal_distribution<RealType>(), 0.125)) / 2, tolerance);
190 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(5), std::numeric_limits<RealType>::infinity()), cdf(complement(normal_distribution<RealType>(), 5)) / 2, tolerance);
191 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(-0.125), std::numeric_limits<RealType>::infinity()), cdf(normal_distribution<RealType>(), -0.125) / 2, tolerance);
192 BOOST_CHECK_CLOSE_FRACTION(owens_t(static_cast<RealType>(-5), std::numeric_limits<RealType>::infinity()), cdf(normal_distribution<RealType>(), -5) / 2, tolerance);
194 } // template <class RealType>void test_spots(RealType)
196 template <class RealType> // Any floating-point type RealType.
197 void check_against_T7(RealType)
199 // Basic sanity checks, test data is as accurate as long double,
200 // so set tolerance to a few epsilon expressed as a fraction.
201 RealType tolerance = boost::math::tools::epsilon<RealType>() * 150; // most OK with 3 eps tolerance.
202 cout << "Tolerance = " << tolerance << "." << endl;
204 using ::boost::math::owens_t;
205 using namespace std; // ADL of std names.
207 // apply log scale because points near zero are more interesting
208 for(RealType a = static_cast<RealType>(-10.0l); a < static_cast<RealType>(3l); a+= static_cast<RealType>(0.2l))
209 for(RealType h = static_cast<RealType>(-10.0l); h < static_cast<RealType>(3.5l); h+= static_cast<RealType>(0.2l))
211 const RealType expa = exp(a);
212 const RealType exph = exp(h);
213 const RealType t = boost::math::owens_t(exph, expa);
214 RealType t7 = boost::math::owens_t_T7(exph,expa);
215 //if(!(boost::math::isnormal)(t) || !(boost::math::isnormal)(t7))
216 // std::cout << "a = " << expa << " h = " << exph << " t = " << t << " t7 = " << t7 << std::endl;
217 BOOST_CHECK_CLOSE_FRACTION(t, t7, tolerance);
220 } // template <class RealType>void test_spots(RealType)
222 template <class Real, class T>
223 void do_test_owens_t(const T& data, const char* type_name, const char* test_name)
225 typedef typename T::value_type row_type;
226 typedef Real value_type;
228 typedef value_type (*pg)(value_type, value_type);
229 #if defined(BOOST_MATH_NO_DEDUCED_FUNCTION_POINTERS)
230 pg funcp = boost::math::owens_t<value_type>;
232 pg funcp = boost::math::owens_t;
235 boost::math::tools::test_result<value_type> result;
237 std::cout << "Testing " << test_name << " with type " << type_name
238 << "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
241 // test hermite against data:
243 result = boost::math::tools::test_hetero<Real>(
245 bind_func<Real>(funcp, 0, 1),
246 extract_result<Real>(2));
247 handle_test_result(result, data[result.worst()], result.worst(), type_name, "boost::math::owens_t", test_name);
249 std::cout << std::endl;
253 void test_owens_t(T, const char* name)
256 // The actual test data is rather verbose, so it's in a separate file
258 // The contents are as follows, each row of data contains
259 // three items, input value a, input value b and erf(a, b):
261 # include "owens_t.ipp"
263 do_test_owens_t<T>(owens_t, name, "Owens T (medium small values)");
265 #include "owens_t_large_data.ipp"
267 do_test_owens_t<T>(owens_t_large_data, name, "Owens T (large and diverse values)");
271 BOOST_AUTO_TEST_CASE( test_main )
273 BOOST_MATH_CONTROL_FP;
277 // Basic sanity-check spot values.
279 // (Parameter value, arbitrarily zero, only communicates the floating point type).
280 test_spots(0.0F); // Test float.
281 test_spots(0.0); // Test double.
282 #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
283 test_spots(0.0L); // Test long double.
284 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))
285 test_spots(boost::math::concepts::real_concept(0.)); // Test real concept.
289 check_against_T7(0.0F); // Test float.
290 check_against_T7(0.0); // Test double.
291 #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
292 check_against_T7(0.0L); // Test long double.
293 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))
294 check_against_T7(boost::math::concepts::real_concept(0.)); // Test real concept.
298 test_owens_t(0.0F, "float"); // Test float.
299 test_owens_t(0.0, "double"); // Test double.
300 #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
301 test_owens_t(0.0L, "long double"); // Test long double.
302 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))
303 test_owens_t(boost::math::concepts::real_concept(0.), "real_concept"); // Test real concept.
306 #ifdef TEST_CPP_DEC_FLOAT
307 typedef boost::multiprecision::mp_number<boost::multiprecision::cpp_dec_float<35> > cpp_dec_float_35;
308 test_owens_t(cpp_dec_float_35(0), "cpp_dec_float_35"); // Test real concept.
309 test_owens_t(boost::multiprecision::cpp_dec_float_50(0), "cpp_dec_float_50"); // Test real concept.
310 test_owens_t(boost::multiprecision::cpp_dec_float_100(0), "cpp_dec_float_100"); // Test real concept.
313 } // BOOST_AUTO_TEST_CASE( test_main )
319 Description: Autorun "J:\Cpp\MathToolkit\test\Math_test\Debug\test_owens_t.exe"
320 Running 1 test case...
321 Tests run with Microsoft Visual C++ version 10.0, Dinkumware standard library version 520, Win32
322 Tolerance = 3.57628e-006.
323 Tolerance = 6.66134e-015.
324 Tolerance = 6.66134e-015.
325 Tolerance = 6.66134e-015.
326 Tolerance = 1.78814e-005.
327 Tolerance = 3.33067e-014.
328 Tolerance = 3.33067e-014.
329 Tolerance = 3.33067e-014.
330 Testing Owens T (medium small values) with type float
331 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
332 boost::math::owens_t<float> Max = 0 RMS Mean=0
335 Testing Owens T (large and diverse values) with type float
336 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
337 boost::math::owens_t<float> Max = 0 RMS Mean=0
340 Testing Owens T (medium small values) with type double
341 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
342 boost::math::owens_t<double> Max = 4.375 RMS Mean=0.9728
343 worst case at row: 81
344 { 4.4206809997558594, 0.1269868016242981, 1.0900281236140834e-006 }
347 Testing Owens T (large and diverse values) with type double
348 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
349 boost::math::owens_t<double> Max = 3.781 RMS Mean=0.6206
350 worst case at row: 430
351 { 3.4516773223876953, 0.0010718167759478092, 4.413983645332431e-007 }
354 Testing Owens T (medium small values) with type long double
355 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
356 boost::math::owens_t<long double> Max = 4.375 RMS Mean=0.9728
357 worst case at row: 81
358 { 4.4206809997558594, 0.1269868016242981, 1.0900281236140834e-006 }
361 Testing Owens T (large and diverse values) with type long double
362 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
363 boost::math::owens_t<long double> Max = 3.781 RMS Mean=0.6206
364 worst case at row: 430
365 { 3.4516773223876953, 0.0010718167759478092, 4.413983645332431e-007 }
368 Testing Owens T (medium small values) with type real_concept
369 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
370 boost::math::owens_t<real_concept> Max = 4.375 RMS Mean=1.032
371 worst case at row: 81
372 { 4.4206809997558594, 0.1269868016242981, 1.0900281236140834e-006 }
375 Testing Owens T (large and diverse values) with type real_concept
376 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
377 boost::math::owens_t<real_concept> Max = 21.04 RMS Mean=1.102
378 worst case at row: 439
379 { 3.4516773223876953, 0.98384737968444824, 0.00013923002576038691 }
383 *** No errors detected