likelihood_base Class Reference

Defines an interface to calculate log-likelihoods given a set of parameters for an specific model, and assuming that the corresponding datatypes have Gaussian errors. More...

#include "likelihood/likelihood_base.h"

Inheritance diagram for likelihood_base:

Public Member Functions
virtual double	operator() (std::vector< double > &x)
	Returns the log-likelihood of a vector of parameters \( \mathbf{x} \).
virtual std::vector< double >	gradient (std::vector< double > &x, prior &Pr)
virtual double	chi_squared (std::vector< double > &x)
	Returns the \( \chi^2 \) of a vector of parameters \( \mathbf{x} \).
virtual void	set_mpi_communicator (MPI_Comm comm)
	Defines a set of processors provided to the model for parallel computation via an MPI communicator. Only facilates code parallelization if the model computation is parallelized via MPI.
void	output_model_data_comparison (std::ostream &out)
void	output_model_data_comparison (std::string filename)

Protected Member Functions
virtual void	output (std::ostream &out)

Protected Attributes
MPI_Comm	_comm

Private Member Functions
double	step_size (double u)

Private Attributes
double	_logLikelihood
std::vector< double >	_xlast

Detailed Description

Warning

This class contains multiple purely virtual functions, making it impossible to generate an explicit instantiation.

Member Function Documentation

std::vector< double > gradient ( std::vector< double > &  x, prior &  Pr  )

virtual

Returns the gradient of the log-likelihood of a vector of parameters \( \mathbf{x} \) The prior permits parameter checking if required during likelihood gradient evaluation, through the gradients of the prior is applied elsewhere.

Reimplemented in likelihood_optimal_complex_gain_constrained_crosshand_visibilities, and likelihood_optimal_complex_gain_visibility.

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void output ( std::ostream &  out )

protectedvirtual

Outputs the data and model, as modified by the likelihood appropriately, to the specified output stream. Useful for comparison later. ASSUMES that only process 0 on _comm is outputting.

Reimplemented in likelihood_optimal_complex_gain_constrained_crosshand_visibilities, likelihood_optimal_complex_gain_visibility, likelihood_optimal_gain_correction_visibility_amplitude, likelihood_marginalized_closure_phase, likelihood_closure_amplitude, likelihood_marginalized_visibility_amplitude, likelihood_closure_phase, likelihood_crosshand_visibilities, likelihood_matched_filter, likelihood_visibility, likelihood_polarization_fraction, likelihood_flux, and likelihood_visibility_amplitude.

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void output_model_data_comparison

(

std::ostream &

out

)

Outputs the data and model, as modified by the likelihood appropriately, to the specified output stream. Useful for comparison later. ASSUMES that only process 0 on _comm is outputting.

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void output_model_data_comparison

(

std::string

filename

)

Outputs the data and model, as modified by the likelihood appropriately, to the specified output file. Useful for comparison later.

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

• likelihood/likelihood_base.h
• likelihood/likelihood_base.cpp