QuantLib: a free/open-source library for quantitative finance
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chebyshevinterpolation.hpp
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1/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2
3/*
4 Copyright (C) 2021 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 chebyshevinterpolation.hpp
21 \brief chebyshev interpolation between discrete Chebyshev nodes
22*/
23
24#ifndef quantlib_chebyshev_interpolation_hpp
25#define quantlib_chebyshev_interpolation_hpp
26
27#include <ql/functional.hpp>
28#include <ql/math/array.hpp>
30
31
32namespace QuantLib {
33 class LagrangeInterpolation;
34
35 /*! References:
36 S.A. Sarra: Chebyshev Interpolation: An Interactive Tour,
37 https://www.maa.org/sites/default/files/images/upload_library/4/vol6/Sarra/Chebyshev.html
38 */
39
41 public:
43
45 const Array& y, PointsType pointsType = SecondKind);
47 Size n, const ext::function<Real(Real)>& f,
48 PointsType pointsType = SecondKind);
49
50 void updateY(const Array& y);
51
52 Array nodes() const;
53 static Array nodes(Size n, PointsType pointsType);
54
55 private:
56 const Array x_;
58 ext::shared_ptr<LagrangeInterpolation> lagrangeInterp_;
59 };
60}
61
62#endif
1-D array used in linear algebra.
1-D array used in linear algebra.
Definition: array.hpp:52
ext::shared_ptr< LagrangeInterpolation > lagrangeInterp_
base class for 1-D interpolations.
Maps function, bind and cref to either the boost or std implementation.
QL_REAL Real
real number
Definition: types.hpp:50
std::size_t Size
size of a container
Definition: types.hpp:58
base class for 1-D interpolations
Definition: any.hpp:35