SegmentIntegral (3) Linux Manual Page
QuantLib::SegmentIntegral – Integral of a one-dimensional function.
Synopsis
#include <ql/math/integrals/segmentintegral.hpp>Inherits QuantLib::Integrator.
Public Member Functions
SegmentIntegral (Size intervals)Protected Member Functions
virtual Real integrate (const boost::function< Real(Real)> &f, Real a, Real b) constDetailed Description
Integral of a one-dimensional function.Given a number $ N $ of intervals, the integral of a function $ f $ between $ a $ and $ b $ is calculated by means of the trapezoid formula [ int_{a}^{b} f mathrm{d}x = ac{1}{2} f(x_{0}) + f(x_{1}) + f(x_{2}) + ots + f(x_{N-1}) + ac{1}{2} f(x_{N}) ] where $ x_0 = a $, $ x_N = b $, and $ x_i = a+i Delta x $ with $ Delta x = (b-a)/N $.
Tests
- the correctness of the result is tested by checking it against known good values.