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104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
// Copyright John Maddock 2014.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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// Caution: this file contains Quickbook markup as well as code
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// and comments, don't change any of the special comment markups!
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#ifdef _MSC_VER
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# pragma warning (disable : 4996) // disable -D_SCL_SECURE_NO_WARNINGS C++ 'Checked Iterators'
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#endif
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#include <boost/math/distributions/hyperexponential.hpp>
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#include <iostream>
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#ifndef BOOST_NO_CXX11_HDR_ARRAY
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#include <array>
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#endif
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int main()
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{
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{
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//[hyperexponential_snip1
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//=#include <boost/math/distributions/hyperexponential.hpp>
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//=#include <iostream>
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//=int main()
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//={
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const double rates[] = { 1.0 / 10.0, 1.0 / 12.0 };
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boost::math::hyperexponential he(rates);
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std::cout << "Average lifetime: "
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<< boost::math::mean(he)
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<< " years" << std::endl;
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std::cout << "Probability that the appliance will work for more than 15 years: "
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<< boost::math::cdf(boost::math::complement(he, 15.0))
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<< std::endl;
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//=}
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//]
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}
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using namespace boost::math;
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#ifndef BOOST_NO_CXX11_HDR_ARRAY
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{
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//[hyperexponential_snip2
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std::array<double, 2> phase_prob = { 0.5, 0.5 };
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std::array<double, 2> rates = { 1.0 / 10, 1.0 / 12 };
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hyperexponential he(phase_prob.begin(), phase_prob.end(), rates.begin(), rates.end());
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//]
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}
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{
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//[hyperexponential_snip3
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// We could be using any standard library container here... vector, deque, array, list etc:
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std::array<double, 2> phase_prob = { 0.5, 0.5 };
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std::array<double, 2> rates = { 1.0 / 10, 1.0 / 12 };
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hyperexponential he1(phase_prob, rates); // Construct from standard library container.
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double phase_probs2[] = { 0.5, 0.5 };
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double rates2[] = { 1.0 / 10, 1.0 / 12 };
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hyperexponential he2(phase_probs2, rates2); // Construct from native C++ array.
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//]
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}
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{
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//[hyperexponential_snip4
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// We could be using any standard library container here... vector, deque, array, list etc:
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std::array<double, 2> rates = { 1.0 / 10, 1.0 / 12 };
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hyperexponential he(rates.begin(), rates.end());
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assert(he.probabilities()[0] == 0.5); // Phase probabilities will be equal and normalised to unity.
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//]
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}
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{
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//[hyperexponential_snip5
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std::array<double, 2> rates = { 1.0 / 10, 1.0 / 12 };
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hyperexponential he(rates);
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assert(he.probabilities()[0] == 0.5); // Phase probabilities will be equal and normalised to unity.
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//]
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}
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#endif
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#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST) && !(defined(BOOST_GCC_VERSION) && (BOOST_GCC_VERSION < 40500))
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{
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//[hyperexponential_snip6
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hyperexponential he = { { 0.5, 0.5 }, { 1.0 / 10, 1.0 / 12 } };
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//]
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}
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{
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//[hyperexponential_snip7
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hyperexponential he = { 1.0 / 10, 1.0 / 12 };
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assert(he.probabilities()[0] == 0.5);
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//]
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}
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#endif
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return 0;
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}
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