RDPickers::LeaderPicker Class Reference

Implements the Leader algorithm for picking a subset of item from a pool. More...

#include <LeaderPicker.h>

Inheritance diagram for RDPickers::LeaderPicker:

Public Member Functions
	LeaderPicker ()
	Default Constructor.
	LeaderPicker (double threshold)
	LeaderPicker (double threshold, int nthreads)
template<typename T >
RDKit::INT_VECT	lazyPick (T &func, unsigned int poolSize, unsigned int pickSize) const
	Contains the implementation for a lazy Leader diversity picker.
template<typename T >
RDKit::INT_VECT	lazyPick (T &func, unsigned int poolSize, unsigned int pickSize, double threshold) const
template<typename T >
RDKit::INT_VECT	lazyPick (T &func, unsigned int poolSize, unsigned int pickSize, const RDKit::INT_VECT &firstPicks, double threshold) const
template<typename T >
RDKit::INT_VECT	lazyPick (T &func, unsigned int poolSize, unsigned int pickSize, const RDKit::INT_VECT &firstPicks, double threshold, int nthreads) const
RDKit::INT_VECT	pick (const double *distMat, unsigned int poolSize, unsigned int pickSize, const RDKit::INT_VECT &firstPicks, double threshold, int nthreads) const
	Contains the implementation for the Leader diversity picker.
RDKit::INT_VECT	pick (const double *distMat, unsigned int poolSize, unsigned int pickSize) const override
Public Member Functions inherited from RDPickers::DistPicker
	DistPicker ()
	Default constructor.
virtual	~DistPicker ()

Public Attributes
double	default_threshold {0.0}
int	default_nthreads {1}

Detailed Description

Implements the Leader algorithm for picking a subset of item from a pool.

This class inherits from the DistPicker and implements a specific picking strategy aimed at diversity. See documentation for "pick()" member function for the algorithm details

Definition at line 32 of file LeaderPicker.h.

Constructor & Destructor Documentation

LeaderPicker() [1/3]

RDPickers::LeaderPicker::LeaderPicker ( )

inline

Default Constructor.

Definition at line 40 of file LeaderPicker.h.

LeaderPicker() [2/3]

RDPickers::LeaderPicker::LeaderPicker ( double  threshold )

inline

Definition at line 41 of file LeaderPicker.h.

LeaderPicker() [3/3]

RDPickers::LeaderPicker::LeaderPicker ( double  threshold, int  nthreads  )

inline

Definition at line 43 of file LeaderPicker.h.

Member Function Documentation

lazyPick() [1/4]

template<typename T >

RDKit::INT_VECT RDPickers::LeaderPicker::lazyPick	(	T &	func,
		unsigned int	poolSize,
		unsigned int	pickSize
	)		const

Contains the implementation for a lazy Leader diversity picker.

See the documentation for the pick() method for details about the algorithm

Parameters

func	- a function (or functor) taking two unsigned ints as arguments and returning the distance (as a double) between those two elements.
poolSize	- the size of the pool to pick the items from. It is assumed that the distance matrix above contains the right number of elements; i.e. poolSize*(poolSize-1)
pickSize	- the number items to pick from pool (<= poolSize)
firstPicks	- (optional)the first items in the pick list
seed	- (optional) seed for the random number generator. If this is <0 the generator will be seeded with a random number.

Definition at line 444 of file LeaderPicker.h.

References default_nthreads, default_threshold, and lazyPick().

Referenced by lazyPick(), lazyPick(), lazyPick(), and pick().

lazyPick() [2/4]

template<typename T >

RDKit::INT_VECT RDPickers::LeaderPicker::lazyPick	(	T &	func,
		unsigned int	poolSize,
		unsigned int	pickSize,
		const RDKit::INT_VECT &	firstPicks,
		double	threshold
	)		const

Definition at line 460 of file LeaderPicker.h.

References default_nthreads, and lazyPick().

lazyPick() [3/4]

template<typename T >

RDKit::INT_VECT RDPickers::LeaderPicker::lazyPick	(	T &	func,
		unsigned int	poolSize,
		unsigned int	pickSize,
		const RDKit::INT_VECT &	firstPicks,
		double	threshold,
		int	nthreads
	)		const

Definition at line 396 of file LeaderPicker.h.

References RDKit::getNumThreadsToUse(), and pick().

lazyPick() [4/4]

template<typename T >

RDKit::INT_VECT RDPickers::LeaderPicker::lazyPick	(	T &	func,
		unsigned int	poolSize,
		unsigned int	pickSize,
		double	threshold
	)		const

Definition at line 452 of file LeaderPicker.h.

References default_nthreads, and lazyPick().

pick() [1/2]

RDKit::INT_VECT RDPickers::LeaderPicker::pick ( const double *  distMat, unsigned int  poolSize, unsigned int  pickSize  ) const

inlineoverridevirtual

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Implements RDPickers::DistPicker.

Definition at line 114 of file LeaderPicker.h.

References default_nthreads, default_threshold, and pick().

pick() [2/2]

RDKit::INT_VECT RDPickers::LeaderPicker::pick ( const double *  distMat, unsigned int  poolSize, unsigned int  pickSize, const RDKit::INT_VECT &  firstPicks, double  threshold, int  nthreads  ) const

inline

Contains the implementation for the Leader diversity picker.

Parameters

distMat	- distance matrix - a vector of double. It is assumed that only the lower triangle element of the matrix are supplied in a 1D array
poolSize	- the size of the pool to pick the items from. It is assumed that the distance matrix above contains the right number of elements; i.e. poolSize*(poolSize-1)
pickSize	- maximum number items to pick from pool (<= poolSize)
firstPicks	- indices of the items used to seed the pick set.

Definition at line 98 of file LeaderPicker.h.

References CHECK_INVARIANT, and lazyPick().

Referenced by lazyPick(), and pick().

Member Data Documentation

default_nthreads

int RDPickers::LeaderPicker::default_nthreads {1}

Definition at line 35 of file LeaderPicker.h.

Referenced by lazyPick(), lazyPick(), lazyPick(), and pick().

default_threshold

double RDPickers::LeaderPicker::default_threshold {0.0}

Definition at line 34 of file LeaderPicker.h.

Referenced by lazyPick(), and pick().

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

• LeaderPicker.h