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GroupSetWinnow Class Reference

A Winnow class with a Group set. More...

#include <GroupSetWinnow.h>

Inheritance diagram for GroupSetWinnow:

List of all members.

Public Member Functions
virtual long double	GetInput (const Example &x, long long int inp)
	Get an example's input to an input of Winnow.
	GroupSetWinnow (GroupSet *grpst, Example *trainexs=NULL, long numex=0, unsigned dmode=HALFHAUSDORFF, unsigned storemd=STOREWEIGHTS|STOREERRORS)
	~GroupSetWinnow ()
long double	Sum (const Example &x, long exindex)
	Compute the weighted sum for an example if it is used to build the group set.
long double	Sum (const Example &x)
	Compute the weighted sum for an example.
void	SetUnitGroup ()
	Set IsUnitGroup as true.
void	PreCompExInputs (Example &x)
	Pre-compute the inputs of an example.
Protected Member Functions
virtual long double	GetInputConstant (long long int inp)
	Return the number of boxes for a group.
Protected Attributes
GroupSet *	grpset
	a group set
unsigned	distmode
	the distance mode: Full-Hausdorff or Half-Hausdorff
unsigned	IsExInBuildingPtSet
	A indicator for current example.
long	curExIndex
	the index of current input example
long long int	lastInputIndex
	the input index called by GetInput() last time.
long double	lastContain
	0 or 1 if the last group contains the example,
bool	IsUnitGroup
	if the number of boxes is not considered

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Detailed Description

A Winnow class with a Group set.

Full-Hausdorff: the number of inputs = 2*# of Groups. Half-Hausdorff: the number of inputs = # of Groups.

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Constructor & Destructor Documentation

GroupSetWinnow::GroupSetWinnow (  GroupSet *    grpst, Example *    trainexs = NULL, long    numex = 0, unsigned    dmode = HALFHAUSDORFF, unsigned    storemd = STOREWEIGHTS|STOREERRORS )

GroupSetWinnow::~GroupSetWinnow (    )

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Member Function Documentation

long double GroupSetWinnow::GetInput (  const Example &    x, long long int    inp )  [virtual]

Get an example's input to an input of Winnow. For Full-Hausdorff, check lastinput. If they are in the same pair, ~lastcontain. If IsExInBuildingPtSet == 1, check if the example is in the point set of the group. Otherwise, check if minimum bounding box built by each point in the example and the group is valid. Implements Neuron< Example >.

long double GroupSetWinnow::GetInputConstant (  long long int    inp )  [protected, virtual]

Return the number of boxes for a group. Reimplemented from Neuron< Example >.

void GroupSetWinnow::PreCompExInputs (  Example &    x )

Pre-compute the inputs of an example. The result will be stored at x.inputs as a bitstring. Parameters: x  an example

void GroupSetWinnow::SetUnitGroup (    )  [inline]

Set IsUnitGroup as true.

long double GroupSetWinnow::Sum (  const Example &    x )  [inline]

Compute the weighted sum for an example. Parameters: x  an example Reimplemented from Neuron< Example >.

long double GroupSetWinnow::Sum (  const Example &    x, long    exindex )

Compute the weighted sum for an example if it is used to build the group set. Will set IsExInBuildingPtSet to 1 first, then set it back to 0. Parameters: x  an example exindex  an index of x

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Member Data Documentation

long GroupSetWinnow::curExIndex [protected]

the index of current input example

unsigned GroupSetWinnow::distmode [protected]

the distance mode: Full-Hausdorff or Half-Hausdorff

GroupSet* GroupSetWinnow::grpset [protected]

a group set

unsigned GroupSetWinnow::IsExInBuildingPtSet [protected]

A indicator for current example. 1: the example is in the point set used to build the group set. Otherwise 0.

bool GroupSetWinnow::IsUnitGroup [protected]

if the number of boxes is not considered

long double GroupSetWinnow::lastContain [protected]

0 or 1 if the last group contains the example, See also: lastInputIndex.

long long int GroupSetWinnow::lastInputIndex [protected]

the input index called by GetInput() last time. if Full-Hausdorff, a paire of inputs only need to be computed once. if -1, never been used.

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

• GroupSetWinnow.h
• GroupSetWinnow.cpp

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