QuantLib: a free/open-source library for quantitative finance
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filonintegral.hpp
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1/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2
3/*
4 Copyright (C) 2014 Klaus Spanderen
5
6 This file is part of QuantLib, a free-software/open-source library
7 for financial quantitative analysts and developers - http://quantlib.org/
8
9 QuantLib is free software: you can redistribute it and/or modify it
10 under the terms of the QuantLib license. You should have received a
11 copy of the license along with this program; if not, please email
12 <quantlib-dev@lists.sf.net>. The license is also available online at
13 <http://quantlib.org/license.shtml>.
14
15 This program is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 FOR A PARTICULAR PURPOSE. See the license for more details.
18*/
19
20/*! \file filonintegral.hpp
21 \brief Filon's formulae for sine and cosine Integrals
22*/
23
24#ifndef quantlib_filon_integral_h
25#define quantlib_filon_integral_h
26
28
29namespace QuantLib {
30
31 //! Integral of a one-dimensional function
32 /*! Given a number \f$ N \f$ of intervals, the integral of
33 a function \f$ f \f$ between \f$ a \f$ and \f$ b \f$ is
34 calculated by means of Filon's sine and cosine integrals
35 */
36
37 /*! References:
38 Abramowitz, M. and Stegun, I. A. (Eds.).
39 Handbook of Mathematical Functions with Formulas, Graphs,
40 and Mathematical Tables, 9th printing. New York: Dover,
41 pp. 890-891, 1972.
42
43 \test the correctness of the result is tested by checking it
44 against known good values.
45 */
46 class FilonIntegral : public Integrator {
47 public:
48 enum Type { Sine, Cosine };
49 FilonIntegral(Type type, Real t, Size intervals);
50
51 protected:
52 Real integrate(const ext::function<Real(Real)>& f, Real a, Real b) const override;
53
54 private:
55 const Type type_;
56 const Real t_;
58 };
59}
60
61#endif
Integral of a one-dimensional function.
Real integrate(const ext::function< Real(Real)> &f, Real a, Real b) const override
const DefaultType & t
ext::function< Real(Real)> b
QL_REAL Real
real number
Definition: types.hpp:50
std::size_t Size
size of a container
Definition: types.hpp:58
Integrators base class definition.
Definition: any.hpp:35