Datax Class Reference

Data container with integrated cluster information management. More...

#include <Datax.hpp>

Inheritance diagram for Datax:

Public Member Functions
	Datax (const utils_params &p, std::vector< std::shared_ptr< ClusterInfo > > ci, const Eigen::VectorXi &initial_allocations=Eigen::VectorXi())
void	set_allocation (int index, int cluster) override
	Assigns a point to a cluster.
void	set_allocations (const Eigen::VectorXi &new_allocations) override
	Sets all cluster allocations at once.
void	restore_state (Eigen::VectorXi &old_allocations, std::unordered_map< int, std::vector< int > > &old_cluster_members, int old_K) override
	Restores allocations, cluster memberships, and cluster count from a saved state.
virtual	~Datax ()=default
Public Member Functions inherited from Data
	Data (const utils_params &p, const Eigen::VectorXi &initial_allocations=Eigen::VectorXi())
	Constructs a Data object with a distance matrix.
virtual	~Data ()=default
double	get_data (int i, int j=0) const
	Getters.
int	get_n () const
	Gets the total number of points.
int	get_K () const
	Gets the current number of clusters.
int	get_p () const
	Gets the number of columns in the data.
const Eigen::VectorXi &	get_allocations () const
	Gets the cluster allocations vector.
int	get_cluster_size (unsigned cluster_index) const
	Gets the size of a specific cluster.
int	get_cluster_assignment (int index) const
	Gets the cluster assignment of a specific point.
Eigen::VectorXi	get_cluster_assignments (int cluster) const
	Gets all point indices assigned to a specific cluster.
Eigen::Map< const Eigen::VectorXi >	get_cluster_assignments_ref (int cluster) const
	Gets all point indices assigned to a specific cluster (map form).
std::unordered_map< int, std::vector< int > >	get_cluster_map_copy () const
	Gets the full mapping of clusters to their member points.
const std::unordered_map< int, std::vector< int > > &	get_cluster_map () const
	Gets the full mapping of clusters to their member points.

Protected Member Functions
void	compact_cluster (int old_cluster)
Protected Member Functions inherited from Data
void	compact_cluster (int old_cluster)
	Removes an empty cluster and compacts cluster indices.
void	set_allocation_wo_compaction (int index, int cluster)
	Assigns a point to a cluster without compaction.

Protected Attributes
std::vector< std::shared_ptr< ClusterInfo > >	cluster_info
Protected Attributes inherited from Data
const utils_params &	p
	Reference to model parameters.
Eigen::VectorXi	allocations
	Cluster allocation for each point.
int	K
	Current number of clusters.
std::unordered_map< int, std::vector< int > >	cluster_members
	Maps cluster indices to vectors of point indices in that cluster.

Detailed Description

Data container with integrated cluster information management.

This class extends the base Data class to include a vector of ClusterInfo objects that can provide additional cluster-related computations or caching. It maintains synchronization between data allocations and cluster information.

Constructor & Destructor Documentation

Datax()

Datax::Datax ( const utils_params & p, std::vector< std::shared_ptr< ClusterInfo > > ci, const Eigen::VectorXi & initial_allocations = Eigen::VectorXi() )

inline

~Datax()

virtual Datax::~Datax ( )

virtualdefault

Member Function Documentation

compact_cluster()

void Datax::compact_cluster ( int old_cluster )

protected

restore_state()

void Datax::restore_state ( Eigen::VectorXi & old_allocations, std::unordered_map< int, std::vector< int > > & old_cluster_members, int old_K )

overridevirtual

Restores allocations, cluster memberships, and cluster count from a saved state.

Parameters

old_allocations	Vector holding the saved allocations (swapped into place)
old_cluster_members	Map of saved cluster memberships (swapped into place)
old_K	Number of clusters in the saved state

Reimplemented from Data.

set_allocation()

void Datax::set_allocation ( int index, int cluster )

overridevirtual

Assigns a point to a cluster.

Parameters

index	Index of the point to reassign
cluster	Target cluster index (K for new cluster, -1 for unallocated)

Exceptions

std::out_of_range

if index or cluster is invalid

Reimplemented from Data.

set_allocations()

void Datax::set_allocations ( const Eigen::VectorXi & new_allocations )

overridevirtual

Sets all cluster allocations at once.

Parameters

new_allocations

Vector of cluster assignments for all points

Exceptions

std::invalid_argument

if vector size doesn't match number of points

Reimplemented from Data.

Member Data Documentation

cluster_info

std::vector<std::shared_ptr<ClusterInfo> > Datax::cluster_info

protected

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

• BNPClust/utils/Datax.hpp
• BNPClust/utils/Datax.cpp