MTBrownianGenerator Class Reference

Mersenne-twister Brownian generator for market-model simulations. More...

#include <ql/models/marketmodels/browniangenerators/mtbrowniangenerator.hpp>

Inherits BrownianGenerator.

Public Member Functions

 MTBrownianGenerator (Size factors, Size steps, unsigned long seed=0)
 
Real nextStep (std::vector< Real > &)
 
Real nextPath ()
 
Size numberOfFactors () const
 
Size numberOfSteps () const
 
- Public Member Functions inherited from BrownianGenerator
virtual Real nextStep (std::vector< Real > &)=0
 
virtual Real nextPath ()=0
 
virtual Size numberOfFactors () const =0
 
virtual Size numberOfSteps () const =0
 

Detailed Description

Mersenne-twister Brownian generator for market-model simulations.

Incremental Brownian generator using a Mersenne-twister uniform generator and inverse-cumulative Gaussian method.

Note
At this time, generation of the underlying uniform sequence is eager, while its transformation into Gaussian variates is lazy. Further optimization might be possible by using the Mersenne twister directly instead of a RandomSequenceGenerator; however, it is not clear how much of a difference this would make when compared to the inverse-cumulative Gaussian calculation.