QuantLib
: a free/open-source library for quantitative finance
Fully annotated sources - version 1.32
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ql
models
marketmodels
models
alphaformconcrete.cpp
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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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Copyright (C) 2007 Mark Joshi
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This file is part of QuantLib, a free-software/open-source library
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for financial quantitative analysts and developers - http://quantlib.org/
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QuantLib is free software: you can redistribute it and/or modify it
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under the terms of the QuantLib license. You should have received a
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copy of the license along with this program; if not, please email
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<quantlib-dev@lists.sf.net>. The license is also available online at
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<http://quantlib.org/license.shtml>.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the license for more details.
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*/
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#include <ql/models/marketmodels/models/alphaformconcrete.hpp>
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#include <cmath>
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#include <utility>
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namespace
QuantLib
{
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AlphaFormInverseLinear::AlphaFormInverseLinear
(std::vector<Time> times,
Real
alpha)
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: times_(
std
::move(times)), alpha_(alpha) {}
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Real
AlphaFormInverseLinear::operator()
(
Integer
i)
const
{
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return
1.0/(1.0+
alpha_
*
times_
[i]);
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}
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void
AlphaFormInverseLinear::setAlpha
(
Real
alpha) {
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alpha_
=alpha;
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}
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AlphaFormLinearHyperbolic::AlphaFormLinearHyperbolic
(std::vector<Time> times,
Real
alpha)
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: times_(
std
::move(times)), alpha_(alpha) {}
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Real
AlphaFormLinearHyperbolic::operator()
(
Integer
i)
const
{
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Real
at =
alpha_
*
times_
[i];
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Real
res = std::atan(at)-0.5*M_PI;
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res *= at;
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res += 1.0;
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res =std::sqrt(res);
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return
res;
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}
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void
AlphaFormLinearHyperbolic::setAlpha
(
Real
alpha) {
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alpha_
= alpha;
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}
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}
QuantLib::AlphaFormInverseLinear::AlphaFormInverseLinear
AlphaFormInverseLinear(std::vector< Time > times, Real alpha=0.0)
Definition:
alphaformconcrete.cpp:26
QuantLib::AlphaFormInverseLinear::setAlpha
void setAlpha(Real alpha_) override
Definition:
alphaformconcrete.cpp:33
QuantLib::AlphaFormInverseLinear::times_
std::vector< Time > times_
Definition:
alphaformconcrete.hpp:36
QuantLib::AlphaFormInverseLinear::operator()
Real operator()(Integer i) const override
Definition:
alphaformconcrete.cpp:29
QuantLib::AlphaFormInverseLinear::alpha_
Real alpha_
Definition:
alphaformconcrete.hpp:37
QuantLib::AlphaFormLinearHyperbolic::setAlpha
void setAlpha(Real alpha_) override
Definition:
alphaformconcrete.cpp:50
QuantLib::AlphaFormLinearHyperbolic::times_
std::vector< Time > times_
Definition:
alphaformconcrete.hpp:48
QuantLib::AlphaFormLinearHyperbolic::operator()
Real operator()(Integer i) const override
Definition:
alphaformconcrete.cpp:41
QuantLib::AlphaFormLinearHyperbolic::alpha_
Real alpha_
Definition:
alphaformconcrete.hpp:49
QuantLib::AlphaFormLinearHyperbolic::AlphaFormLinearHyperbolic
AlphaFormLinearHyperbolic(std::vector< Time > times, Real alpha=0.0)
Definition:
alphaformconcrete.cpp:38
QuantLib::Real
QL_REAL Real
real number
Definition:
types.hpp:50
QuantLib::Integer
QL_INTEGER Integer
integer number
Definition:
types.hpp:35
QuantLib
Definition:
any.hpp:35
std
STL namespace.
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