libs/math/example/arcsine_example.cpp

// arcsine_example.cpp
// Copyright John Maddock 2014.
// Copyright  Paul A. Bristow 2014.
// 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)
// Example for the arcsine Distribution.
// Note: Contains Quickbook snippets in comments.
//[arcsine_snip_1
#include <boost/math/distributions/arcsine.hpp> // For arcsine_distribution.
//] [/arcsine_snip_1]
#include <iostream>
#include <exception>
int main()
{
  std::cout << "Examples of Arcsine distribution." << std::endl;
  std::cout.precision(3);  // Avoid uninformative decimal digits.
  using boost::math::arcsine;
  arcsine as; // Construct a default `double` standard [0, 1] arcsine distribution.
//[arcsine_snip_2
  std::cout << pdf(as, 1. / 2) << std::endl; // 0.637
  // pdf has a minimum at x = 0.5
//]  [/arcsine_snip_2]
//[arcsine_snip_3
  std::cout << pdf(as, 1. / 4) << std::endl; // 0.735
//]  [/arcsine_snip_3]
//[arcsine_snip_4
  std::cout << cdf(as, 0.05) << std::endl; // 0.144
//] [/arcsine_snip_4]
//[arcsine_snip_5
  std::cout << 2 * cdf(as, 1 - 0.975) << std::endl; // 0.202
//] [/arcsine_snip_5]
//[arcsine_snip_6
  std::cout << 2 * cdf(complement(as, 0.975)) << std::endl; // 0.202
//] [/arcsine_snip_6]
//[arcsine_snip_7
  std::cout << quantile(as, 1 - 0.2 / 2) << std::endl; //  0.976
  std::cout << quantile(complement(as, 0.2 / 2)) << std::endl; // 0.976
//] [/arcsine_snip_7]
{
//[arcsine_snip_8
  using boost::math::arcsine_distribution;
  arcsine_distribution<> as(2, 5); // Cconstructs a double arcsine distribution.
  assert(as.x_min() == 2.);  // as.x_min() returns 2.
  assert(as.x_max() == 5.);   // as.x_max()  returns 5.
//] [/arcsine_snip_8]
}
    return 0;
} // int main()
/*
[arcsine_output
Example of Arcsine distribution
0.637
0.735
0.144
0.202
0.202
0.976
0.976
] [/arcsine_output]
*/