---

Alias Class Reference

Aliasing data. More...

#include <alias.h>

List of all members.

Public Methods
int	size () const
	Give the size of aliasing array. More...
double	threshold (const int i) const
	Give the threshold corresponding to the ith aliasing array index. More...
int	col (const int i) const
	Give the column index corresponding to the ith aliasing array index. More...
int	alias (const int i) const
	Give the alias index corresponding to the ith aliasing array index. More...
void	init (const int d)
	Initialization of aliasing tables. More...
void	mk_walker (const int d)
	Construction of Walker array. More...
void	transpose (const int d)
	Transposition of Walker array. More...
int	read (const string path)
	Reading of aliasing data for simulation step. More...
void	write_construct (const string file_name, const int d)
	Writing of definitive Walker array (stored by column). More...
int	walk (const double rand, const int j, const int n, const int d, const int i)
	Walker's algorithm for discrete distributions. More...
Private Types
typedef AliasStruct	stock
Private Attributes
vector< stock >	S

---

Detailed Description

Aliasing data.

Walker's algorithm is used to generate internal transitions in the simulation kernel.

---

Member Typedef Documentation

typedef struct AliasStruct Alias::stock [private]

Type stock to manipulate AliasStruct in PSI processes.

---

Member Function Documentation

int Alias::alias (  const int    i )  const [inline]

Give the alias index corresponding to the ith aliasing array index.

int Alias::col (  const int    i )  const [inline]

Give the column index corresponding to the ith aliasing array index.

void Alias::init (  const int    d )

Initialization of aliasing tables. Parameters: d  an integer corresponding to the matrix width.

void Alias::mk_walker (  const int    d )

Construction of Walker array. This array is built by rows and provides a representetion of the Markov chain to simulate. Parameters: d  an integer corresponding to the matrix width.

int Alias::read (  const string    path )

Reading of aliasing data for simulation step. Parameters: file  a string corresponding to the name of the input file '.simu'.

int Alias::size (    )  const [inline]

Give the size of aliasing array.

double Alias::threshold (  const int    i )  const [inline]

Give the threshold corresponding to the ith aliasing array index.

void Alias::transpose (  const int    d )

Transposition of Walker array. Parameters: d  an integer corresponding to the matrix width. We obtain by this way a contiguous representation for the simulation step.

int Alias::walk (  const double    rand, const int    j, const int    n, const int    d, const int    i )

Walker's algorithm for discrete distributions. Parameters: rand  a double value according to uniform law on [0;1]. j  an integer corresponding to a random choice of column index. n  an integer corresponding to the space state dimension. d  an integer corresponding to the matrix width. i  an integer between 0 and N-1 ( where N:= matrix dimension) being the current cursor.

void Alias::write_construct (  const string    file_name, const int    d )

Writing of definitive Walker array (stored by column). Parameters: namefile  a string corresponding to the name of the output file '.simu'. d  an integer corresponding to the matrix width.

---

Member Data Documentation

vector<stock> Alias::S [private]

Storage of aliasing arrays.

---

The documentation for this class was generated from the following files:

• alias.h
• alias.cpp
• alias.inl

---