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Diffstat (limited to 'src/boost/libs/math/test/test_rayleigh.cpp')
-rw-r--r-- | src/boost/libs/math/test/test_rayleigh.cpp | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/src/boost/libs/math/test/test_rayleigh.cpp b/src/boost/libs/math/test/test_rayleigh.cpp new file mode 100644 index 00000000..242ec32f --- /dev/null +++ b/src/boost/libs/math/test/test_rayleigh.cpp @@ -0,0 +1,332 @@ +// Copyright John Maddock 2006. + +// Use, modification and distribution are subject to the +// Boost Software License, Version 1.0. +// (See accompanying file LICENSE_1_0.txt +// or copy at http://www.boost.org/LICENSE_1_0.txt) + +// test_rayleigh.cpp + +#ifdef _MSC_VER +# pragma warning(disable: 4127) // conditional expression is constant. +# pragma warning(disable: 4100) // unreferenced formal parameter. +#endif + +#include <boost/math/concepts/real_concept.hpp> // for real_concept +#include <boost/math/distributions/rayleigh.hpp> + using boost::math::rayleigh_distribution; +#include <boost/math/tools/test.hpp> + +#define BOOST_TEST_MAIN +#include <boost/test/unit_test.hpp> // Boost.Test +#include <boost/test/tools/floating_point_comparison.hpp> +#include "test_out_of_range.hpp" + +#include <iostream> + using std::cout; + using std::endl; + using std::setprecision; + +template <class RealType> +void test_spot(RealType s, RealType x, RealType p, RealType q, RealType tolerance) +{ + BOOST_CHECK_CLOSE( + ::boost::math::cdf( + rayleigh_distribution<RealType>(s), + x), + p, + tolerance); // % + BOOST_CHECK_CLOSE( + ::boost::math::cdf( + complement(rayleigh_distribution<RealType>(s), + x)), + q, + tolerance); // % + // Special extra tests for p and q near to unity. + if(p < 0.999) + { + BOOST_CHECK_CLOSE( + ::boost::math::quantile( + rayleigh_distribution<RealType>(s), + p), + x, + tolerance); // % + } + if(q < 0.999) + { + BOOST_CHECK_CLOSE( + ::boost::math::quantile( + complement(rayleigh_distribution<RealType>(s), + q)), + x, + tolerance); // % + } + if(std::numeric_limits<RealType>::has_infinity) + { + RealType inf = std::numeric_limits<RealType>::infinity(); + BOOST_CHECK_EQUAL(pdf(rayleigh_distribution<RealType>(s), inf), 0); + BOOST_CHECK_EQUAL(cdf(rayleigh_distribution<RealType>(s), inf), 1); + BOOST_CHECK_EQUAL(cdf(complement(rayleigh_distribution<RealType>(s), inf)), 0); + } +} // void test_spot + +template <class RealType> +void test_spots(RealType T) +{ + using namespace std; // ADL of std names. + // Basic sanity checks. + // 50 eps as a percentage, up to a maximum of double precision + // (that's the limit of our test data: obtained by punching + // numbers into a calculator). + RealType tolerance = (std::max)( + static_cast<RealType>(boost::math::tools::epsilon<double>()), + boost::math::tools::epsilon<RealType>()); + tolerance *= 10 * 100; // 10 eps as a percent + cout << "Tolerance for type " << typeid(T).name() << " is " << tolerance << " %" << endl; + + using namespace boost::math::constants; + + // Things that are errors: + rayleigh_distribution<RealType> dist(0.5); + + check_out_of_range<rayleigh_distribution<RealType> >(1); + BOOST_MATH_CHECK_THROW( + quantile(dist, + RealType(1.)), // quantile unity should overflow. + std::overflow_error); + BOOST_MATH_CHECK_THROW( + quantile(complement(dist, + RealType(0.))), // quantile complement zero should overflow. + std::overflow_error); + BOOST_MATH_CHECK_THROW( + pdf(dist, RealType(-1)), // Bad negative x. + std::domain_error); + BOOST_MATH_CHECK_THROW( + cdf(dist, RealType(-1)), // Bad negative x. + std::domain_error); + BOOST_MATH_CHECK_THROW( + cdf(rayleigh_distribution<RealType>(-1), // bad sigma < 0 + RealType(1)), + std::domain_error); + BOOST_MATH_CHECK_THROW( + cdf(rayleigh_distribution<RealType>(0), // bad sigma == 0 + RealType(1)), + std::domain_error); + BOOST_MATH_CHECK_THROW( + quantile(dist, RealType(-1)), // negative quantile probability. + std::domain_error); + BOOST_MATH_CHECK_THROW( + quantile(dist, RealType(2)), // > unity quantile probability. + std::domain_error); + + test_spot( + static_cast<RealType>(1.L), // sigma + static_cast<RealType>(1.L), // x + static_cast<RealType>(1 - exp_minus_half<RealType>()), // p + static_cast<RealType>(exp_minus_half<RealType>()), // q + tolerance); + + test_spot( + static_cast<RealType>(0.5L), // sigma + static_cast<RealType>(0.5L), // x + static_cast<RealType>(1 - exp_minus_half<RealType>()), // p + static_cast<RealType>(exp_minus_half<RealType>()), //q + tolerance); + + test_spot( + static_cast<RealType>(3.L), // sigma + static_cast<RealType>(3.L), // x + static_cast<RealType>(1 - exp_minus_half<RealType>()), // p + static_cast<RealType>(exp_minus_half<RealType>()), //q + tolerance); + + BOOST_CHECK_CLOSE( + ::boost::math::pdf( + rayleigh_distribution<RealType>(1.L), + static_cast<RealType>(1.L)), // x + static_cast<RealType>(exp_minus_half<RealType>()), // probability. + tolerance); // % + BOOST_CHECK_CLOSE( + ::boost::math::pdf( + rayleigh_distribution<RealType>(0.5L), + static_cast<RealType>(0.5L)), // x + static_cast<RealType>(2 * exp_minus_half<RealType>()), // probability. + tolerance); // % + BOOST_CHECK_CLOSE( + ::boost::math::pdf( + rayleigh_distribution<RealType>(2.L), + static_cast<RealType>(2.L)), // x + static_cast<RealType>(exp_minus_half<RealType>() /2), // probability. + tolerance); // % + + BOOST_CHECK_CLOSE( + ::boost::math::mean( + rayleigh_distribution<RealType>(1.L)), + static_cast<RealType>(root_half_pi<RealType>()), + tolerance); // % + BOOST_CHECK_CLOSE( + ::boost::math::variance( + rayleigh_distribution<RealType>(root_two<RealType>())), + static_cast<RealType>(four_minus_pi<RealType>()), + tolerance * 100); // % + + BOOST_CHECK_CLOSE( + ::boost::math::mode( + rayleigh_distribution<RealType>(1.L)), + static_cast<RealType>(1.L), + tolerance); // % + + BOOST_CHECK_CLOSE( + ::boost::math::median( + rayleigh_distribution<RealType>(1.L)), + static_cast<RealType>(sqrt(log(4.L))), // sigma * sqrt(log_four) + tolerance); // % + + BOOST_CHECK_CLOSE( + ::boost::math::skewness( + rayleigh_distribution<RealType>(1.L)), + static_cast<RealType>(2.L * root_pi<RealType>()) * (pi<RealType>() - 3) / (pow((4 - pi<RealType>()), static_cast<RealType>(1.5L))), + tolerance * 100); // % + + BOOST_CHECK_CLOSE( + ::boost::math::skewness( + rayleigh_distribution<RealType>(1.L)), + static_cast<RealType>(0.63111065781893713819189935154422777984404221106391L), + tolerance * 100); // % + + BOOST_CHECK_CLOSE( + ::boost::math::kurtosis_excess( + rayleigh_distribution<RealType>(1.L)), + -static_cast<RealType>(6 * pi<RealType>() * pi<RealType>() - 24 * pi<RealType>() + 16) / + ((4 - pi<RealType>()) * (4 - pi<RealType>())), + // static_cast<RealType>(0.2450893006876380628486604106197544154170667057995L), + tolerance * 1000); // % + + BOOST_CHECK_CLOSE( + ::boost::math::kurtosis( + rayleigh_distribution<RealType>(1.L)), + static_cast<RealType>(3.2450893006876380628486604106197544154170667057995L), + tolerance * 100); // % + + + BOOST_CHECK_CLOSE( + ::boost::math::kurtosis_excess(rayleigh_distribution<RealType>(2)), + ::boost::math::kurtosis(rayleigh_distribution<RealType>(2)) -3, + tolerance* 100); // % + return; + +} // template <class RealType>void test_spots(RealType) + +BOOST_AUTO_TEST_CASE( test_main ) +{ + // Check that can generate rayleigh distribution using the two convenience methods: + boost::math::rayleigh ray1(1.); // Using typedef + rayleigh_distribution<> ray2(1.); // Using default RealType double. + + using namespace boost::math::constants; + // Basic sanity-check spot values. + + // Double only tests. + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::pdf( + rayleigh_distribution<double>(1.), + static_cast<double>(1)), // x + static_cast<double>(exp_minus_half<double>()), // p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::pdf( + rayleigh_distribution<double>(0.5), + static_cast<double>(0.5)), // x + static_cast<double>(2 * exp_minus_half<double>()), // p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::pdf( + rayleigh_distribution<double>(2.), + static_cast<double>(2)), // x + static_cast<double>(exp_minus_half<double>() /2 ), // p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::cdf( + rayleigh_distribution<double>(1.), + static_cast<double>(1)), // x + static_cast<double>(1- exp_minus_half<double>()), // p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::cdf( + rayleigh_distribution<double>(2.), + static_cast<double>(2)), // x + static_cast<double>(1- exp_minus_half<double>()), // p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::cdf( + rayleigh_distribution<double>(3.), + static_cast<double>(3)), // x + static_cast<double>(1- exp_minus_half<double>()), // p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::cdf( + rayleigh_distribution<double>(4.), + static_cast<double>(4)), // x + static_cast<double>(1- exp_minus_half<double>()), // p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::cdf(complement( + rayleigh_distribution<double>(4.), + static_cast<double>(4))), // x + static_cast<double>(exp_minus_half<double>()), // q = 1 - p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::quantile( + rayleigh_distribution<double>(4.), + static_cast<double>(1- exp_minus_half<double>())), // x + static_cast<double>(4), // p + 1e-15); // % + + BOOST_CHECK_CLOSE_FRACTION( + ::boost::math::quantile(complement( + rayleigh_distribution<double>(4.), + static_cast<double>(exp_minus_half<double>()))), // x + static_cast<double>(4), // p + 1e-15); // % + + // (Parameter value, arbitrarily zero, only communicates the floating point type). + test_spots(0.0F); // Test float. OK at decdigits = 0 tolerance = 0.0001 % + test_spots(0.0); // Test double. OK at decdigits 7, tolerance = 1e07 % +#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS + test_spots(0.0L); // Test long double. +#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582)) + test_spots(boost::math::concepts::real_concept(0.)); // Test real concept. +#endif +#else + std::cout << "<note>The long double tests have been disabled on this platform " + "either because the long double overloads of the usual math functions are " + "not available at all, or because they are too inaccurate for these tests " + "to pass.</note>" << std::endl; +#endif + + +} // BOOST_AUTO_TEST_CASE( test_main ) + +/* + +Output is: + +Autorun "i:\boost-06-05-03-1300\libs\math\test\Math_test\debug\test_rayleigh.exe" +Running 1 test case... +Tolerance for type float is 0.000119209 % +Tolerance for type double is 2.22045e-013 % +Tolerance for type long double is 2.22045e-013 % +Tolerance for type class boost::math::concepts::real_concept is 2.22045e-013 % +*** No errors detected + +*/ + + |