PointSet Class Reference

#include <point-set.h>

List of all members.

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Detailed Description

A data structure representing a list of Feature vectors.

All features in the set must have the same dimension, and this is determined when the PointSet is constructed. Features may be added, removed, and replaced by index. Bounds checking is done automatically, as is checking that any new Features added to the PointSet have the same dimension.

Public Member Functions
	PointSet (int feature_dim)
	Creates an initially empty set (such that GetNumFeatures() == 0).
int	GetNumFeatures () const
int	GetFeatureDim () const
Feature	GetFeature (int index) const
	Returns a copy of the feature at <index>.
Feature &	operator[] (int index)
	Returns a reference to the feature at <index>.
const Feature &	operator[] (int index) const
	Returns a const reference to the feature at <index>.
void	AddFeature (const Feature &feature)
	Adds a copy of the feature to the end of the list.
void	RemoveFeature (int index)
	Removes the feature at <index>.
void	SetFeature (int index, const Feature &feature)
	Replaces the Feature at <index> with a copy of <feature>.
void	WriteToStream (ostream &output_stream) const
	Writes the point set to a stream.
void	ReadFromStream (istream &input_stream)
	Reads the point set from a stream.

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Constructor & Destructor Documentation

PointSet

(

int

feature_dim

)

Creates an initially empty set (such that GetNumFeatures() == 0).

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Member Function Documentation

int GetNumFeatures

(

)

const

int GetFeatureDim

(

)

const

Feature GetFeature

(

int

index

)

const

Returns a copy of the feature at <index>.

Feature & operator[]

(

int

index

)

Returns a reference to the feature at <index>.

const Feature & operator[]

(

int

index

)

const

Returns a const reference to the feature at <index>.

void AddFeature

(

const Feature &

feature

)

Adds a copy of the feature to the end of the list.

void RemoveFeature

(

int

index

)

Removes the feature at <index>.

void SetFeature	(	int	index,
		const Feature &	feature
	)

Replaces the Feature at <index> with a copy of <feature>.

void WriteToStream

(

ostream &

output_stream

)

const

Writes the point set to a stream.

The format is as follows:

• (int32_t) num_features
• (int32_t) feature_dim
• for each feature:
  • (float * feature_dim) the feature vector
• then, again, for each feature:
  • (float) the feature vector's weight

void ReadFromStream

(

istream &

input_stream

)

Reads the point set from a stream.

This function will clear any Features present currently. It will also assume that the incoming PointSet has the proper feature dim (observe that a serialized PointSet doesn't actually record feature dim-- that is up to PointSetList to remember).

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

• point_set/point-set.h
• point_set/point-set.cc

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