📄 gis.h
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//////////////////////////////////////////////////////////////////////////// Copyright (c) 2000, Yusuke Miyao/// You may distribute under the terms of the Artistic License.////// <id>$Id: GIS.h,v 1.9 2003/05/14 06:01:53 yusuke Exp $</id>/// <collection>Maximum Entropy Estimator</collection>/// <name>GIS.h</name>/// <overview>Generalized Iterative Scaling</overview>/////////////////////////////////////////////////////////////////////////#ifndef Amis_GIS_h_#define Amis_GIS_h_#include <amis/configure.h>#include <amis/IS.h>#include <amis/ModelBase.h>#include <amis/EventSpaceInst.h>#include <amis/ModelExpect.h>#include <amis/FeatureFreqArray.h>AMIS_NAMESPACE_BEGIN///////////////////////////////////////////////////////////////////////// <classdef>/// <name>GISBase</name>/// <overview>Generalized Iterative Scaling</overview>/// <desc>/// A maximum entropy estimator based on the Generalized Iterative Scaling/// algorithm./// The implemented algorithm seems to be one without slack variables, in other words slack variables' alphas are fixed to 1 (J.K.)/// </desc>/// <body>template < class Model, class EventSpace, class ModelExpect = ModelExpect< FeatureFreqValue, Model, EventSpace >, class EmpiricalExpect = EmpiricalExpect< Model, EventSpace > >class GISBase : public IS< Model, EventSpace, ModelExpect, EmpiricalExpect > {private: Real power; //////////////////////////////////////////////////////////////////////public: GISBase() : IS< Model, EventSpace, ModelExpect, EmpiricalExpect >() { power = 0,0; } GISBase( Model& init_model, EventSpace& init_event ) : IS< Model, EventSpace, ModelExpect, EmpiricalExpect >( init_model, init_event ) { power = 0.0; } virtual ~GISBase() {} //////////////////////////////////////////////////////////////////////public: void initialize() { AMIS_DEBUG_MESSAGE( 3, "Set internal data...\n" ); power = static_cast< Real >( 1.0 ) / static_cast< Real >( event_space->maxFeatureCount() ); IS< Model, EventSpace, ModelExpect, EmpiricalExpect >::initialize(); } /// Initialize the estimator Real solveEquation( int i ) { return power * ( log( empirical_expectation[ i ] / model_expectation[ i ] ) ); }};/// </body>/// </classdef>///////////////////////////////////////////////////////////////////////// <classdef>/// <name>GIS</name>/// <overview>Generalized Iterative Scaling</overview>/// <desc>/// A maximum entropy estimator based on the Generalized Iterative Scaling/// algorithm./// </desc>/// <body>template < class Feature >class GIS : public GISBase< ModelBase, EventSpaceInst< Feature > > {public: GIS() : GISBase< ModelBase, EventSpaceInst< Feature > >() {} GIS( ModelBase& init_model, EventSpaceInst< Feature >& init_event ) : GISBase< ModelBase, EventSpaceInst< Feature > >( init_model, init_event ) {} virtual ~GIS() {} const std::string estimatorName() const { return "GIS<" + Feature::featureTypeName() + ">"; } /// Get the name of this class};/// </body>/// </classdef>///////////////////////////////////////////////////////////////////////// <classdef>/// <name>GISJoint</name>/// <overview>Generalized Iterative Scaling</overview>/// <desc>/// A maximum entropy estimator based on the Generalized Iterative Scaling for joint probability estimation/// </desc>/// <body>template < class Feature >class GISJoint : public GISBase< ModelBase, EventSpaceInst< Feature >, ModelExpect< FeatureFreqValue, ModelBase, EventSpaceInst< Feature >, true >, EmpiricalExpect< ModelBase, EventSpaceInst< Feature >, true > > {public: GISJoint() : GISBase< ModelBase, EventSpaceInst< Feature >, ModelExpect< FeatureFreqValue, ModelBase, EventSpaceInst< Feature >, true >, EmpiricalExpect< ModelBase, EventSpaceInst< Feature >, true > >() {} GISJoint( ModelBase& init_model, EventSpaceInst< Feature >& init_event ) : GISBase< ModelBase, EventSpaceInst< Feature >, ModelExpect< FeatureFreqValue, ModelBase, EventSpaceInst< Feature >, true >, EmpiricalExpect< ModelBase, EventSpaceInst< Feature >, true > >( init_model, init_event ) {} virtual ~GISJoint() {} const std::string estimatorName() const { return "GISJoint<" + Feature::featureTypeName() + ">"; } /// Get the name of this class};/// </body>/// </classdef>AMIS_NAMESPACE_END#endif // Amis_GIS_h_// end of GIS.h⌨️ 快捷键说明
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