GClasses
GClasses::GReservoirNet Class Reference

Detailed Description

This model uses a randomely-initialized network to map the inputs into a higher-dimensional space, and it uses a layer of perceptrons to learn in this augmented space.

#include <GNeuralNet.h>

Inheritance diagram for GClasses::GReservoirNet:
GClasses::GIncrementalLearner GClasses::GSupervisedLearner GClasses::GTransducer

Public Member Functions

 GReservoirNet ()
 General-purpose constructor. More...
 
 GReservoirNet (const GDomNode *pNode, GLearnerLoader &ll)
 Deserializing constructor. More...
 
virtual ~GReservoirNet ()
 
virtual void beginIncrementalLearningInner (const GRelation &featureRel, const GRelation &labelRel)
 See the comment for GIncrementalLearner::beginIncrementalLearningInner. More...
 
virtual bool canImplicitlyHandleMissingFeatures ()
 See the comment for GTransducer::canImplicitlyHandleMissingFeatures. More...
 
virtual bool canImplicitlyHandleNominalFeatures ()
 See the comment for GTransducer::canImplicitlyHandleNominalFeatures. More...
 
virtual bool canImplicitlyHandleNominalLabels ()
 See the comment for GTransducer::canImplicitlyHandleNominalLabels. More...
 
virtual void clear ()
 See the comment for GSupervisedLearner::clear. More...
 
virtual void predict (const GVec &in, GVec &out)
 See the comment for GSupervisedLearner::predict. More...
 
virtual void predictDistribution (const GVec &in, GPrediction *pOut)
 See the comment for GSupervisedLearner::predictDistribution. More...
 
virtual GDomNodeserialize (GDom *pDoc) const
 Marshall this object to a DOM. More...
 
void setAugments (size_t n)
 Specify the number of additional attributes to augment the data with. More...
 
void setReservoirLayers (size_t n)
 Specify the number of hidden layers in the reservoir. More...
 
void setWeightDeviation (double d)
 Specify the deviation of the random weights in the reservoir. More...
 
virtual bool supportedFeatureRange (double *pOutMin, double *pOutMax)
 See the comment for GTransducer::supportedFeatureRange. More...
 
virtual bool supportedLabelRange (double *pOutMin, double *pOutMax)
 See the comment for GTransducer::supportedFeatureRange. More...
 
virtual void trainIncremental (const GVec &in, const GVec &out)
 See the comment for GIncrementalLearner::trainIncremental. More...
 
virtual void trainInner (const GMatrix &features, const GMatrix &labels)
 See the comment for GSupervisedLearner::trainInner. More...
 
virtual void trainSparse (GSparseMatrix &features, GMatrix &labels)
 See the comment for GIncrementalLearner::trainSparse. More...
 
- Public Member Functions inherited from GClasses::GIncrementalLearner
 GIncrementalLearner ()
 General-purpose constructor. More...
 
 GIncrementalLearner (const GDomNode *pNode)
 Deserialization constructor. More...
 
virtual ~GIncrementalLearner ()
 Destructor. More...
 
void beginIncrementalLearning (const GRelation &featureRel, const GRelation &labelRel)
 You must call this method before you call trainIncremental. More...
 
void beginIncrementalLearning (const GMatrix &features, const GMatrix &labels)
 A version of beginIncrementalLearning that supports data-dependent filters. More...
 
virtual bool canTrainIncrementally ()
 Returns true. More...
 
virtual bool isFilter ()
 Only the GFilter class should return true to this method. More...
 
- Public Member Functions inherited from GClasses::GSupervisedLearner
 GSupervisedLearner ()
 General-purpose constructor. More...
 
 GSupervisedLearner (const GDomNode *pNode)
 Deserialization constructor. More...
 
virtual ~GSupervisedLearner ()
 Destructor. More...
 
void basicTest (double minAccuracy1, double minAccuracy2, double deviation=1e-6, bool printAccuracy=false, double warnRange=0.035)
 This is a helper method used by the unit tests of several model learners. More...
 
virtual bool canGeneralize ()
 Returns true because fully supervised learners have an internal model that allows them to generalize previously unseen rows. More...
 
void confusion (GMatrix &features, GMatrix &labels, std::vector< GMatrix * > &stats)
 Generates a confusion matrix containing the total counts of the number of times each value was expected and predicted. (Rows represent target values, and columns represent predicted values.) stats should be an empty vector. This method will resize stats to the number of dimensions in the label vector. The caller is responsible to delete all of the matrices that it puts in this vector. For continuous labels, the value will be NULL. More...
 
void precisionRecall (double *pOutPrecision, size_t nPrecisionSize, GMatrix &features, GMatrix &labels, size_t label, size_t nReps)
 label specifies which output to measure. (It should be 0 if there is only one label dimension.) The measurement will be performed "nReps" times and results averaged together nPrecisionSize specifies the number of points at which the function is sampled pOutPrecision should be an array big enough to hold nPrecisionSize elements for every possible label value. (If the attribute is continuous, it should just be big enough to hold nPrecisionSize elements.) If bLocal is true, it computes the local precision instead of the global precision. More...
 
const GRelationrelFeatures ()
 Returns a reference to the feature relation (meta-data about the input attributes). More...
 
const GRelationrelLabels ()
 Returns a reference to the label relation (meta-data about the output attributes). More...
 
double sumSquaredError (const GMatrix &features, const GMatrix &labels, double *pOutSAE=NULL)
 Computes the sum-squared-error for predicting the labels from the features. For categorical labels, Hamming distance is used. More...
 
void train (const GMatrix &features, const GMatrix &labels)
 Call this method to train the model. More...
 
virtual double trainAndTest (const GMatrix &trainFeatures, const GMatrix &trainLabels, const GMatrix &testFeatures, const GMatrix &testLabels, double *pOutSAE=NULL)
 Trains and tests this learner. Returns sum-squared-error. More...
 
- Public Member Functions inherited from GClasses::GTransducer
 GTransducer ()
 General-purpose constructor. More...
 
 GTransducer (const GTransducer &that)
 Copy-constructor. Throws an exception to prevent models from being copied by value. More...
 
virtual ~GTransducer ()
 
virtual bool canImplicitlyHandleContinuousFeatures ()
 Returns true iff this algorithm can implicitly handle continuous features. If it cannot, then the GDiscretize transform will be used to convert continuous features to nominal values before passing them to it. More...
 
virtual bool canImplicitlyHandleContinuousLabels ()
 Returns true iff this algorithm can implicitly handle continuous labels (a.k.a. regression). If it cannot, then the GDiscretize transform will be used during training to convert nominal labels to continuous values, and to convert nominal predictions back to continuous labels. More...
 
double crossValidate (const GMatrix &features, const GMatrix &labels, size_t nFolds, double *pOutSAE=NULL, RepValidateCallback pCB=NULL, size_t nRep=0, void *pThis=NULL)
 Perform n-fold cross validation on pData. Returns sum-squared error. Uses trainAndTest for each fold. pCB is an optional callback method for reporting intermediate stats. It can be NULL if you don't want intermediate reporting. nRep is just the rep number that will be passed to the callback. pThis is just a pointer that will be passed to the callback for you to use however you want. It doesn't affect this method. if pOutSAE is not NULL, the sum absolute error will be placed there. More...
 
GTransduceroperator= (const GTransducer &other)
 Throws an exception to prevent models from being copied by value. More...
 
GRandrand ()
 Returns a reference to the random number generator associated with this object. For example, you could use it to change the random seed, to make this algorithm behave differently. This might be important, for example, in an ensemble of learners. More...
 
double repValidate (const GMatrix &features, const GMatrix &labels, size_t reps, size_t nFolds, double *pOutSAE=NULL, RepValidateCallback pCB=NULL, void *pThis=NULL)
 Perform cross validation "nReps" times and return the average score. pCB is an optional callback method for reporting intermediate stats It can be NULL if you don't want intermediate reporting. pThis is just a pointer that will be passed to the callback for you to use however you want. It doesn't affect this method. if pOutSAE is not NULL, the sum absolute error will be placed there. More...
 
std::unique_ptr< GMatrixtransduce (const GMatrix &features1, const GMatrix &labels1, const GMatrix &features2)
 Predicts a set of labels to correspond with features2, such that these labels will be consistent with the patterns exhibited by features1 and labels1. More...
 
void transductiveConfusionMatrix (const GMatrix &trainFeatures, const GMatrix &trainLabels, const GMatrix &testFeatures, const GMatrix &testLabels, std::vector< GMatrix * > &stats)
 Makes a confusion matrix for a transduction algorithm. More...
 

Static Public Member Functions

static void test ()
 
- Static Public Member Functions inherited from GClasses::GSupervisedLearner
static void test ()
 Runs some unit tests related to supervised learning. Throws an exception if any problems are found. More...
 

Protected Attributes

size_t m_augments
 
GIncrementalLearnerm_pModel
 
GNeuralNetLearnerm_pNN
 
size_t m_reservoirLayers
 
double m_weightDeviation
 
- Protected Attributes inherited from GClasses::GSupervisedLearner
GRelationm_pRelFeatures
 
GRelationm_pRelLabels
 
- Protected Attributes inherited from GClasses::GTransducer
GRand m_rand
 

Additional Inherited Members

- Protected Member Functions inherited from GClasses::GIncrementalLearner
virtual void beginIncrementalLearningInner (const GMatrix &features, const GMatrix &labels)
 
- Protected Member Functions inherited from GClasses::GSupervisedLearner
GDomNodebaseDomNode (GDom *pDoc, const char *szClassName) const
 Child classes should use this in their implementation of serialize. More...
 
size_t precisionRecallContinuous (GPrediction *pOutput, double *pFunc, GMatrix &trainFeatures, GMatrix &trainLabels, GMatrix &testFeatures, GMatrix &testLabels, size_t label)
 This is a helper method used by precisionRecall. More...
 
size_t precisionRecallNominal (GPrediction *pOutput, double *pFunc, GMatrix &trainFeatures, GMatrix &trainLabels, GMatrix &testFeatures, GMatrix &testLabels, size_t label, int value)
 This is a helper method used by precisionRecall. More...
 
void setupFilters (const GMatrix &features, const GMatrix &labels)
 This method determines which data filters (normalize, discretize, and/or nominal-to-cat) are needed and trains them. More...
 
virtual std::unique_ptr< GMatrixtransduceInner (const GMatrix &features1, const GMatrix &labels1, const GMatrix &features2)
 See GTransducer::transduce. More...
 
- Static Protected Member Functions inherited from GClasses::GSupervisedLearner
static void addInterpolatedFunction (double *pOut, size_t nOutVals, double *pIn, size_t nInVals)
 Adds the function pIn to pOut after interpolating pIn to be the same size as pOut. (This is a helper-function used by precisionRecall.) More...
 

Constructor & Destructor Documentation

GClasses::GReservoirNet::GReservoirNet ( )

General-purpose constructor.

GClasses::GReservoirNet::GReservoirNet ( const GDomNode pNode,
GLearnerLoader ll 
)

Deserializing constructor.

virtual GClasses::GReservoirNet::~GReservoirNet ( )
virtual

Member Function Documentation

virtual void GClasses::GReservoirNet::beginIncrementalLearningInner ( const GRelation featureRel,
const GRelation labelRel 
)
virtual
virtual bool GClasses::GReservoirNet::canImplicitlyHandleMissingFeatures ( )
inlinevirtual
virtual bool GClasses::GReservoirNet::canImplicitlyHandleNominalFeatures ( )
inlinevirtual
virtual bool GClasses::GReservoirNet::canImplicitlyHandleNominalLabels ( )
inlinevirtual

See the comment for GTransducer::canImplicitlyHandleNominalLabels.

Reimplemented from GClasses::GTransducer.

virtual void GClasses::GReservoirNet::clear ( )
virtual

See the comment for GSupervisedLearner::clear.

Implements GClasses::GSupervisedLearner.

virtual void GClasses::GReservoirNet::predict ( const GVec in,
GVec out 
)
virtual
virtual void GClasses::GReservoirNet::predictDistribution ( const GVec in,
GPrediction pOut 
)
virtual
virtual GDomNode* GClasses::GReservoirNet::serialize ( GDom pDoc) const
virtual

Marshall this object to a DOM.

Implements GClasses::GSupervisedLearner.

void GClasses::GReservoirNet::setAugments ( size_t  n)
inline

Specify the number of additional attributes to augment the data with.

void GClasses::GReservoirNet::setReservoirLayers ( size_t  n)
inline

Specify the number of hidden layers in the reservoir.

void GClasses::GReservoirNet::setWeightDeviation ( double  d)
inline

Specify the deviation of the random weights in the reservoir.

virtual bool GClasses::GReservoirNet::supportedFeatureRange ( double *  pOutMin,
double *  pOutMax 
)
virtual

See the comment for GTransducer::supportedFeatureRange.

Reimplemented from GClasses::GTransducer.

virtual bool GClasses::GReservoirNet::supportedLabelRange ( double *  pOutMin,
double *  pOutMax 
)
virtual

See the comment for GTransducer::supportedFeatureRange.

Reimplemented from GClasses::GTransducer.

static void GClasses::GReservoirNet::test ( )
static
virtual void GClasses::GReservoirNet::trainIncremental ( const GVec in,
const GVec out 
)
virtual
virtual void GClasses::GReservoirNet::trainInner ( const GMatrix features,
const GMatrix labels 
)
virtual
virtual void GClasses::GReservoirNet::trainSparse ( GSparseMatrix features,
GMatrix labels 
)
virtual

Member Data Documentation

size_t GClasses::GReservoirNet::m_augments
protected
GIncrementalLearner* GClasses::GReservoirNet::m_pModel
protected
GNeuralNetLearner* GClasses::GReservoirNet::m_pNN
protected
size_t GClasses::GReservoirNet::m_reservoirLayers
protected
double GClasses::GReservoirNet::m_weightDeviation
protected