Params Struct Reference

Structure containing all parameters needed for the NGGP (Normalized Generalized Gamma Process) and DP (Dirichlet Process) model. More...

#include <Params.hpp>

Public Member Functions
	Params (double delta1=0.5, double alpha=2, double beta=2, double delta2=2, double gamma=2, double zeta=2, int BI=1000, int NI=10000, double a=1.0, double sigma=1.0, double tau=1.0, double coefficient=1, Eigen::MatrixXi W=Eigen::MatrixXi())
	Constructor with default parameter values.

Public Attributes
double	delta1
	Shape parameter for the first gamma distribution prior.
double	alpha
	Shape parameter for the lambda_k gamma distribution.
double	beta
	Rate parameter for the lambda_k gamma distribution.
double	delta2
	Shape parameter for the second gamma distribution prior.
double	gamma
	Shape parameter for the theta_kt gamma distribution.
double	zeta
	Rate parameter for the theta_kt gamma distribution.
int	BI
	Number of burn-in iterations to discard for chain convergence.
int	NI
	Number of iterations after burn-in for posterior sampling.
double	a
	Total mass parameter of the NGGP (controls number of clusters)
double	sigma
	Second parameter of the NGGP (controls cluster sizes)
double	tau
	Third parameter of the NGGP (controls tail behavior)
double	coefficient
	Coefficient controlling the strength of spatial dependency.
Eigen::MatrixXi	W
	Adjacency matrix defining spatial neighborhood structure.

Detailed Description

Structure containing all parameters needed for the NGGP (Normalized Generalized Gamma Process) and DP (Dirichlet Process) model.

This structure holds all the hyperparameters, model parameters, and configuration settings required for running the DP and NGGP Bayesian nonparametric model with and without spatial dependency.

The parameters are organized into several categories:

• Distribution hyperparameters for gamma priors (delta1, alpha, beta, delta2, gamma, zeta)
• Simulation control parameters (BI, NI)
• NGGP process parameters (a, sigma, tau)
• Spatial dependency parameters (coefficient, W)

Constructor & Destructor Documentation

Params()

Params::Params ( double delta1 = 0.5, double alpha = 2, double beta = 2, double delta2 = 2, double gamma = 2, double zeta = 2, int BI = 1000, int NI = 10000, double a = 1.0, double sigma = 1.0, double tau = 1.0, double coefficient = 1, Eigen::MatrixXi W = Eigen::MatrixXi() )

inline

Constructor with default parameter values.

Parameters

delta1	Shape parameter for first gamma prior (default: 0.5)
alpha	Shape parameter for lambda_k gamma distribution (default: 2)
beta	Rate parameter for lambda_k gamma distribution (default: 2)
delta2	Shape parameter for second gamma prior (default: 2)
gamma	Shape parameter for theta_kt gamma distribution (default: 2)
zeta	Rate parameter for theta_kt gamma distribution (default: 2)
BI	Number of burn-in iterations (default: 1000)
NI	Number of post burn-in iterations (default: 10000)
a	NGGP total mass parameter (default: 1.0)
sigma	NGGP second parameter (default: 1.0)
tau	NGGP third parameter (default: 1.0)
coefficient	Spatial dependency coefficient (default: 1)
W	Adjacency matrix (default: empty matrix)

Member Data Documentation

a

double Params::a

Total mass parameter of the NGGP (controls number of clusters)

alpha

double Params::alpha

Shape parameter for the lambda_k gamma distribution.

beta

double Params::beta

Rate parameter for the lambda_k gamma distribution.

BI

int Params::BI

Number of burn-in iterations to discard for chain convergence.

coefficient

double Params::coefficient

Coefficient controlling the strength of spatial dependency.

delta1

double Params::delta1

Shape parameter for the first gamma distribution prior.

delta2

double Params::delta2

Shape parameter for the second gamma distribution prior.

gamma

double Params::gamma

Shape parameter for the theta_kt gamma distribution.

NI

int Params::NI

Number of iterations after burn-in for posterior sampling.

sigma

double Params::sigma

Second parameter of the NGGP (controls cluster sizes)

tau

double Params::tau

Third parameter of the NGGP (controls tail behavior)

W

Eigen::MatrixXi Params::W

Adjacency matrix defining spatial neighborhood structure.

zeta

double Params::zeta

Rate parameter for the theta_kt gamma distribution.

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The documentation for this struct was generated from the following file:

• src/utils/Params.hpp