TMVA::DNN::TReference< AReal > Class Template Reference

template<typename AReal>
class TMVA::DNN::TReference< AReal >

The reference architecture class.

Class template that contains the reference implementation of the low-level interface for the DNN implementation. The reference implementation uses the TMatrixT class template to represent matrices.

Template Parameters

AReal

The floating point type used to represent scalars.

Definition at line 30 of file DataLoader.h.

Public Types
using	Matrix_t = TMatrixT< AReal >
using	Scalar_t = AReal

Public Member Functions
template<typename AMatrix_t >
void	CopyDiffArch (std::vector< TMatrixT< AReal >> &A, const std::vector< AMatrix_t > &B)

Static Public Member Functions
static void	AddBiases (TMatrixT< AReal > &A, const TMatrixT< AReal > &biases)
static void	ConvLayerForward (std::vector< TMatrixT< AReal >> &, std::vector< TMatrixT< AReal >> &, const std::vector< TMatrixT< AReal >> &, const TMatrixT< AReal > &, const TMatrixT< AReal > &, EActivationFunction, const std::vector< int > &, size_t, size_t, AReal, bool)
	Forward propagation in the Convolutional layer. More...
static void	CorruptInput (TMatrixT< AReal > &input, TMatrixT< AReal > &corruptedInput, AReal corruptionLevel)
static void	EncodeInput (TMatrixT< AReal > &input, TMatrixT< AReal > &compressedInput, TMatrixT< AReal > &Weights)
static void	ForwardLogReg (TMatrixT< AReal > &input, TMatrixT< AReal > &p, TMatrixT< AReal > &fWeights)
static void	ReconstructInput (TMatrixT< AReal > &compressedInput, TMatrixT< AReal > &reconstructedInput, TMatrixT< AReal > &fWeights)
static void	SoftmaxAE (TMatrixT< AReal > &A)
static void	SumColumns (TMatrixT< AReal > &B, const TMatrixT< AReal > &A)
	Sum columns of (m x n) matrixx A and write the results into the first m elements in A. More...
static void	UpdateParams (TMatrixT< AReal > &x, TMatrixT< AReal > &tildeX, TMatrixT< AReal > &y, TMatrixT< AReal > &z, TMatrixT< AReal > &fVBiases, TMatrixT< AReal > &fHBiases, TMatrixT< AReal > &fWeights, TMatrixT< AReal > &VBiasError, TMatrixT< AReal > &HBiasError, AReal learningRate, size_t fBatchSize)
static void	UpdateParamsLogReg (TMatrixT< AReal > &input, TMatrixT< AReal > &output, TMatrixT< AReal > &difference, TMatrixT< AReal > &p, TMatrixT< AReal > &fWeights, TMatrixT< AReal > &fBiases, AReal learningRate, size_t fBatchSize)
Forward Propagation
Low-level functions required for the forward propagation of activations through the network.
static void	MultiplyTranspose (TMatrixT< Scalar_t > &output, const TMatrixT< Scalar_t > &input, const TMatrixT< Scalar_t > &weights)
	Matrix-multiply input with the transpose of and write the results into output. More...
static void	AddRowWise (TMatrixT< Scalar_t > &output, const TMatrixT< Scalar_t > &biases)
	Add the vectors biases row-wise to the matrix output. More...
Backward Propagation
Low-level functions required for the forward propagation of activations through the network.
static void	Backward (TMatrixT< Scalar_t > &activationGradientsBackward, TMatrixT< Scalar_t > &weightGradients, TMatrixT< Scalar_t > &biasGradients, TMatrixT< Scalar_t > &df, const TMatrixT< Scalar_t > &activationGradients, const TMatrixT< Scalar_t > &weights, const TMatrixT< Scalar_t > &activationBackward)
	Perform the complete backward propagation step. More...
static Matrix_t &	RecurrentLayerBackward (TMatrixT< Scalar_t > &state_gradients_backward, TMatrixT< Scalar_t > &input_weight_gradients, TMatrixT< Scalar_t > &state_weight_gradients, TMatrixT< Scalar_t > &bias_gradients, TMatrixT< Scalar_t > &df, const TMatrixT< Scalar_t > &state, const TMatrixT< Scalar_t > &weights_input, const TMatrixT< Scalar_t > &weights_state, const TMatrixT< Scalar_t > &input, TMatrixT< Scalar_t > &input_gradient)
	Backpropagation step for a Recurrent Neural Network. More...
static void	ScaleAdd (TMatrixT< Scalar_t > &A, const TMatrixT< Scalar_t > &B, Scalar_t beta=1.0)
	Adds a the elements in matrix B scaled by c to the elements in the matrix A. More...
static void	Copy (TMatrixT< Scalar_t > &A, const TMatrixT< Scalar_t > &B)
template<typename AMatrix_t >
static void	CopyDiffArch (TMatrixT< Scalar_t > &A, const AMatrix_t &B)
static void	ScaleAdd (std::vector< TMatrixT< Scalar_t >> &A, const std::vector< TMatrixT< Scalar_t >> &B, Scalar_t beta=1.0)
	Above functions extended to vectors. More...
static void	Copy (std::vector< TMatrixT< Scalar_t >> &A, const std::vector< TMatrixT< Scalar_t >> &B)
template<typename AMatrix_t >
static void	CopyDiffArch (std::vector< TMatrixT< Scalar_t > > &A, const std::vector< AMatrix_t > &B)
Activation Functions
For each activation function, the low-level interface contains two routines. One that applies the acitvation function to a matrix and one that evaluate the derivatives of the activation function at the elements of a given matrix and writes the results into the result matrix.
static void	Identity (TMatrixT< AReal > &B)
static void	IdentityDerivative (TMatrixT< AReal > &B, const TMatrixT< AReal > &A)
static void	Relu (TMatrixT< AReal > &B)
static void	ReluDerivative (TMatrixT< AReal > &B, const TMatrixT< AReal > &A)
static void	Sigmoid (TMatrixT< AReal > &B)
static void	SigmoidDerivative (TMatrixT< AReal > &B, const TMatrixT< AReal > &A)
static void	Tanh (TMatrixT< AReal > &B)
static void	TanhDerivative (TMatrixT< AReal > &B, const TMatrixT< AReal > &A)
static void	SymmetricRelu (TMatrixT< AReal > &B)
static void	SymmetricReluDerivative (TMatrixT< AReal > &B, const TMatrixT< AReal > &A)
static void	SoftSign (TMatrixT< AReal > &B)
static void	SoftSignDerivative (TMatrixT< AReal > &B, const TMatrixT< AReal > &A)
static void	Gauss (TMatrixT< AReal > &B)
static void	GaussDerivative (TMatrixT< AReal > &B, const TMatrixT< AReal > &A)
Loss Functions
Loss functions compute a scalar value given the output of the network for a given training input and the expected network prediction Y that quantifies the quality of the prediction. For each function also a routing that computes the gradients (suffixed by Gradients) must be provided for the starting of the backpropagation algorithm.
static AReal	MeanSquaredError (const TMatrixT< AReal > &Y, const TMatrixT< AReal > &output, const TMatrixT< AReal > &weights)
static void	MeanSquaredErrorGradients (TMatrixT< AReal > &dY, const TMatrixT< AReal > &Y, const TMatrixT< AReal > &output, const TMatrixT< AReal > &weights)
static AReal	CrossEntropy (const TMatrixT< AReal > &Y, const TMatrixT< AReal > &output, const TMatrixT< AReal > &weights)
	Sigmoid transformation is implicitly applied, thus output should hold the linear activations of the last layer in the net. More...
static void	CrossEntropyGradients (TMatrixT< AReal > &dY, const TMatrixT< AReal > &Y, const TMatrixT< AReal > &output, const TMatrixT< AReal > &weights)
static AReal	SoftmaxCrossEntropy (const TMatrixT< AReal > &Y, const TMatrixT< AReal > &output, const TMatrixT< AReal > &weights)
	Softmax transformation is implicitly applied, thus output should hold the linear activations of the last layer in the net. More...
static void	SoftmaxCrossEntropyGradients (TMatrixT< AReal > &dY, const TMatrixT< AReal > &Y, const TMatrixT< AReal > &output, const TMatrixT< AReal > &weights)
Output Functions
Output functions transform the activations output of the output layer in the network to a valid prediction YHat for the desired usage of the network, e.g. the identity function for regression or the sigmoid transformation for two-class classification.
static void	Sigmoid (TMatrixT< AReal > &YHat, const TMatrixT< AReal > &)
static void	Softmax (TMatrixT< AReal > &YHat, const TMatrixT< AReal > &)
Regularization
For each regularization type two functions are required, one named <Type>Regularization that evaluates the corresponding regularization functional for a given weight matrix and the Add<Type>RegularizationGradients, that adds the regularization component in the gradients to the provided matrix.
static AReal	L1Regularization (const TMatrixT< AReal > &W)
static void	AddL1RegularizationGradients (TMatrixT< AReal > &A, const TMatrixT< AReal > &W, AReal weightDecay)
static AReal	L2Regularization (const TMatrixT< AReal > &W)
static void	AddL2RegularizationGradients (TMatrixT< AReal > &A, const TMatrixT< AReal > &W, AReal weightDecay)
Initialization
For each initialization method, one function in the low-level interface is provided. The naming scheme is Initialize<Type> for a given initialization method Type.
static void	InitializeGauss (TMatrixT< AReal > &A)
static void	InitializeUniform (TMatrixT< AReal > &A)
static void	InitializeIdentity (TMatrixT< AReal > &A)
static void	InitializeZero (TMatrixT< AReal > &A)
static void	InitializeGlorotUniform (TMatrixT< AReal > &A)
	Sample from a uniform distribution in range [ -lim,+lim] where lim = sqrt(6/N_in+N_out). More...
static void	InitializeGlorotNormal (TMatrixT< AReal > &A)
	Truncated normal initialization (Glorot, called also Xavier normal) The values are sample with a normal distribution with stddev = sqrt(2/N_input + N_output) and values larger than 2 * stddev are discarded See Glorot & Bengio, AISTATS 2010 - http://jmlr.org/proceedings/papers/v9/glorot10a/glorot10a.pdf. More...
static TRandom &	GetRandomGenerator ()
static void	SetRandomSeed (size_t seed)
Dropout
static void	Dropout (TMatrixT< AReal > &A, AReal dropoutProbability)
	Apply dropout with activation probability p to the given matrix A and scale the result by reciprocal of p. More...
Forward Propagation in Convolutional Layer
static void	Im2col (TMatrixT< AReal > &A, TMatrixT< AReal > &B, size_t imgHeight, size_t imgWidth, size_t fltHeight, size_t fltWidth, size_t strideRows, size_t strideCols, size_t zeroPaddingHeight, size_t zeroPaddingWidth)
	Transform the matrix B in local view format, suitable for convolution, and store it in matrix A. More...
static void	Im2colIndices (std::vector< int > &, const TMatrixT< AReal > &, size_t, size_t, size_t, size_t, size_t, size_t, size_t, size_t, size_t)
static void	Im2colFast (TMatrixT< AReal > &, const TMatrixT< AReal > &, const std::vector< int > &)
static void	RotateWeights (TMatrixT< AReal > &A, const TMatrixT< AReal > &B, size_t filterDepth, size_t filterHeight, size_t filterWidth, size_t numFilters)
	Rotates the matrix B, which is representing a weights, and stores them in the matrix A. More...
static void	AddConvBiases (TMatrixT< AReal > &output, const TMatrixT< AReal > &biases)
	Add the biases in the Convolutional Layer. More...
Backward Propagation in Convolutional Layer
static void	ConvLayerBackward (std::vector< TMatrixT< AReal >> &, TMatrixT< AReal > &, TMatrixT< AReal > &, std::vector< TMatrixT< AReal >> &, const std::vector< TMatrixT< AReal >> &, const TMatrixT< AReal > &, const std::vector< TMatrixT< AReal >> &, size_t, size_t, size_t, size_t, size_t, size_t, size_t, size_t, size_t, size_t)
	Perform the complete backward propagation step in a Convolutional Layer. More...
Forward Propagation in Max Pooling Layer
static void	Downsample (TMatrixT< AReal > &A, TMatrixT< AReal > &B, const TMatrixT< AReal > &C, size_t imgHeight, size_t imgWidth, size_t fltHeight, size_t fltWidth, size_t strideRows, size_t strideCols)
	Downsample the matrix C to the matrix A, using max operation, such that the winning indices are stored in matrix B. More...
Backward Propagation in Max Pooling Layer
static void	MaxPoolLayerBackward (std::vector< TMatrixT< AReal >> &activationGradientsBackward, const std::vector< TMatrixT< AReal >> &activationGradients, const std::vector< TMatrixT< AReal >> &indexMatrix, size_t batchSize, size_t depth, size_t nLocalViews)
	Perform the complete backward propagation step in a Max Pooling Layer. More...
Forward and Backward Propagation in Reshape Layer
static void	Reshape (TMatrixT< AReal > &A, const TMatrixT< AReal > &B)
	Transform the matrix B to a matrix with different dimensions A. More...
static void	Flatten (TMatrixT< AReal > &A, const std::vector< TMatrixT< AReal >> &B, size_t size, size_t nRows, size_t nCols)
	Flattens the tensor B, such that each matrix, is stretched in one row, resulting with a matrix A. More...
static void	Deflatten (std::vector< TMatrixT< AReal >> &A, const TMatrixT< Scalar_t > &B, size_t index, size_t nRows, size_t nCols)
	Transforms each row of B to a matrix and stores it in the tensor B. More...
static void	Rearrange (std::vector< TMatrixT< AReal >> &out, const std::vector< TMatrixT< AReal >> &in)
	Rearrage data accoring to time fill B x T x D out with T x B x D matrix in. More...

Static Private Attributes
static TRandom *	fgRandomGen = nullptr

#include <TMVA/DNN/Architectures/Reference/DataLoader.h>

Member Typedef Documentation

Matrix_t

template<typename AReal >

using TMVA::DNN::TReference< AReal >::Matrix_t = TMatrixT<AReal>

Definition at line 50 of file Reference.h.

Scalar_t

template<typename AReal >

using TMVA::DNN::TReference< AReal >::Scalar_t = AReal

Definition at line 49 of file Reference.h.

Member Function Documentation

AddBiases()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::AddBiases ( TMatrixT< AReal > &  A, const TMatrixT< AReal > &  biases  )

static

Definition at line 30 of file DenoisePropagation.cxx.

AddConvBiases()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::AddConvBiases ( TMatrixT< AReal > &  output, const TMatrixT< AReal > &  biases  )

static

Add the biases in the Convolutional Layer.

Definition at line 170 of file Propagation.cxx.

AddL1RegularizationGradients()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::AddL1RegularizationGradients ( TMatrixT< AReal > &  A, const TMatrixT< AReal > &  W, AReal  weightDecay  )

static

Definition at line 44 of file Regularization.cxx.

AddL2RegularizationGradients()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::AddL2RegularizationGradients ( TMatrixT< AReal > &  A, const TMatrixT< AReal > &  W, AReal  weightDecay  )

static

Definition at line 82 of file Regularization.cxx.

AddRowWise()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::AddRowWise ( TMatrixT< Scalar_t > &  output, const TMatrixT< Scalar_t > &  biases  )

static

Add the vectors biases row-wise to the matrix output.

Definition at line 30 of file Propagation.cxx.

Backward()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Backward ( TMatrixT< Scalar_t > &  activationGradientsBackward, TMatrixT< Scalar_t > &  weightGradients, TMatrixT< Scalar_t > &  biasGradients, TMatrixT< Scalar_t > &  df, const TMatrixT< Scalar_t > &  activationGradients, const TMatrixT< Scalar_t > &  weights, const TMatrixT< Scalar_t > &  activationBackward  )

static

Perform the complete backward propagation step.

If the provided activationGradientsBackward matrix is not empty, compute the gradients of the objective function with respect to the activations of the previous layer (backward direction). Also compute the weight and the bias gradients. Modifies the values in df and thus produces only a valid result, if it is applied the first time after the corresponding forward propagation has been per- formed.

Definition at line 40 of file Propagation.cxx.

ConvLayerBackward()

template<typename AReal >

static void TMVA::DNN::TReference< AReal >::ConvLayerBackward ( std::vector< TMatrixT< AReal >> &  , TMatrixT< AReal > &  , TMatrixT< AReal > &  , std::vector< TMatrixT< AReal >> &  , const std::vector< TMatrixT< AReal >> &  , const TMatrixT< AReal > &  , const std::vector< TMatrixT< AReal >> &  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t    )

inlinestatic

Perform the complete backward propagation step in a Convolutional Layer.

If the provided activationGradientsBackward matrix is not empty, compute the gradients of the objective function with respect to the activations of the previous layer (backward direction). Also compute the weight and the bias gradients. Modifies the values in df and thus produces only a valid result, if it is applied the first time after the corresponding forward propagation has been per- formed.

Definition at line 370 of file Reference.h.

ConvLayerForward()

template<typename AReal >

static void TMVA::DNN::TReference< AReal >::ConvLayerForward ( std::vector< TMatrixT< AReal >> &  , std::vector< TMatrixT< AReal >> &  , const std::vector< TMatrixT< AReal >> &  , const TMatrixT< AReal > &  , const TMatrixT< AReal > &  , EActivationFunction  , const std::vector< int > &  , size_t  , size_t  , AReal  , bool    )

inlinestatic

Forward propagation in the Convolutional layer.

Definition at line 340 of file Reference.h.

Copy() [1/2]

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Copy ( TMatrixT< Scalar_t > &  A, const TMatrixT< Scalar_t > &  B  )

static

Definition at line 86 of file Propagation.cxx.

Copy() [2/2]

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Copy ( std::vector< TMatrixT< Scalar_t >> &  A, const std::vector< TMatrixT< Scalar_t >> &  B  )

static

Definition at line 100 of file Propagation.cxx.

CopyDiffArch() [1/3]

template<typename AReal >

template<typename AMatrix_t >

void TMVA::DNN::TReference< AReal >::CopyDiffArch ( TMatrixT< Scalar_t > &  A, const AMatrix_t &  B  )

static

Definition at line 527 of file Reference.h.

CopyDiffArch() [2/3]

template<typename AReal >

template<typename AMatrix_t >

static void TMVA::DNN::TReference< AReal >::CopyDiffArch ( std::vector< TMatrixT< Scalar_t > > &  A, const std::vector< AMatrix_t > &  B  )

static

CopyDiffArch() [3/3]

template<typename AReal >

template<typename AMatrix_t >

void TMVA::DNN::TReference< AReal >::CopyDiffArch	(	std::vector< TMatrixT< AReal >> &	A,
		const std::vector< AMatrix_t > &	B
	)

Definition at line 535 of file Reference.h.

CorruptInput()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::CorruptInput ( TMatrixT< AReal > &  input, TMatrixT< AReal > &  corruptedInput, AReal  corruptionLevel  )

static

Definition at line 108 of file DenoisePropagation.cxx.

CrossEntropy()

template<typename AReal >

AReal TMVA::DNN::TReference< AReal >::CrossEntropy ( const TMatrixT< AReal > &  Y, const TMatrixT< AReal > &  output, const TMatrixT< AReal > &  weights  )

static

Sigmoid transformation is implicitly applied, thus output should hold the linear activations of the last layer in the net.

Definition at line 64 of file LossFunctions.cxx.

CrossEntropyGradients()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::CrossEntropyGradients ( TMatrixT< AReal > &  dY, const TMatrixT< AReal > &  Y, const TMatrixT< AReal > &  output, const TMatrixT< AReal > &  weights  )

static

Definition at line 85 of file LossFunctions.cxx.

Deflatten()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Deflatten ( std::vector< TMatrixT< AReal >> &  A, const TMatrixT< Scalar_t > &  B, size_t  index, size_t  nRows, size_t  nCols  )

static

Transforms each row of B to a matrix and stores it in the tensor B.

Definition at line 432 of file Propagation.cxx.

Downsample()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Downsample ( TMatrixT< AReal > &  A, TMatrixT< AReal > &  B, const TMatrixT< AReal > &  C, size_t  imgHeight, size_t  imgWidth, size_t  fltHeight, size_t  fltWidth, size_t  strideRows, size_t  strideCols  )

static

Downsample the matrix C to the matrix A, using max operation, such that the winning indices are stored in matrix B.

Definition at line 345 of file Propagation.cxx.

Dropout()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::Dropout ( TMatrixT< AReal > &  A, AReal  dropoutProbability  )

static

Apply dropout with activation probability p to the given matrix A and scale the result by reciprocal of p.

Definition at line 29 of file Dropout.cxx.

EncodeInput()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::EncodeInput ( TMatrixT< AReal > &  input, TMatrixT< AReal > &  compressedInput, TMatrixT< AReal > &  Weights  )

static

Definition at line 134 of file DenoisePropagation.cxx.

Flatten()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Flatten ( TMatrixT< AReal > &  A, const std::vector< TMatrixT< AReal >> &  B, size_t  size, size_t  nRows, size_t  nCols  )

static

Flattens the tensor B, such that each matrix, is stretched in one row, resulting with a matrix A.

Definition at line 418 of file Propagation.cxx.

ForwardLogReg()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::ForwardLogReg ( TMatrixT< AReal > &  input, TMatrixT< AReal > &  p, TMatrixT< AReal > &  fWeights  )

static

Definition at line 171 of file DenoisePropagation.cxx.

Gauss()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::Gauss ( TMatrixT< AReal > &  B )

inlinestatic

Definition at line 206 of file ActivationFunctions.cxx.

GaussDerivative()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::GaussDerivative ( TMatrixT< AReal > &  B, const TMatrixT< AReal > &  A  )

inlinestatic

Definition at line 222 of file ActivationFunctions.cxx.

GetRandomGenerator()

template<typename Real_t >

TRandom & TMVA::DNN::TReference< Real_t >::GetRandomGenerator ( )

static

Definition at line 35 of file Initialization.cxx.

Identity()

template<typename AReal >

static void TMVA::DNN::TReference< AReal >::Identity ( TMatrixT< AReal > &  B )

static

IdentityDerivative()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::IdentityDerivative ( TMatrixT< AReal > &  B, const TMatrixT< AReal > &  A  )

static

Definition at line 27 of file ActivationFunctions.cxx.

Im2col()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Im2col ( TMatrixT< AReal > &  A, TMatrixT< AReal > &  B, size_t  imgHeight, size_t  imgWidth, size_t  fltHeight, size_t  fltWidth, size_t  strideRows, size_t  strideCols, size_t  zeroPaddingHeight, size_t  zeroPaddingWidth  )

static

Transform the matrix B in local view format, suitable for convolution, and store it in matrix A.

Definition at line 120 of file Propagation.cxx.

Im2colFast()

template<typename AReal >

static void TMVA::DNN::TReference< AReal >::Im2colFast ( TMatrixT< AReal > &  , const TMatrixT< AReal > &  , const std::vector< int > &    )

inlinestatic

Definition at line 320 of file Reference.h.

Im2colIndices()

template<typename AReal >

static void TMVA::DNN::TReference< AReal >::Im2colIndices ( std::vector< int > &  , const TMatrixT< AReal > &  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t  , size_t    )

inlinestatic

Definition at line 316 of file Reference.h.

InitializeGauss()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::InitializeGauss ( TMatrixT< AReal > &  A )

static

Definition at line 43 of file Initialization.cxx.

InitializeGlorotNormal()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::InitializeGlorotNormal ( TMatrixT< AReal > &  A )

static

Truncated normal initialization (Glorot, called also Xavier normal) The values are sample with a normal distribution with stddev = sqrt(2/N_input + N_output) and values larger than 2 * stddev are discarded See Glorot & Bengio, AISTATS 2010 - http://jmlr.org/proceedings/papers/v9/glorot10a/glorot10a.pdf.

Definition at line 85 of file Initialization.cxx.

InitializeGlorotUniform()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::InitializeGlorotUniform ( TMatrixT< AReal > &  A )

static

Sample from a uniform distribution in range [ -lim,+lim] where lim = sqrt(6/N_in+N_out).

This initialization is also called Xavier uniform see Glorot & Bengio, AISTATS 2010 - http://jmlr.org/proceedings/papers/v9/glorot10a/glorot10a.pdf

Definition at line 110 of file Initialization.cxx.

InitializeIdentity()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::InitializeIdentity ( TMatrixT< AReal > &  A )

static

Definition at line 129 of file Initialization.cxx.

InitializeUniform()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::InitializeUniform ( TMatrixT< AReal > &  A )

static

Definition at line 62 of file Initialization.cxx.

InitializeZero()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::InitializeZero ( TMatrixT< AReal > &  A )

static

Definition at line 148 of file Initialization.cxx.

L1Regularization()

template<typename AReal >

Real_t TMVA::DNN::TReference< Real_t >::L1Regularization ( const TMatrixT< AReal > &  W )

static

Definition at line 26 of file Regularization.cxx.

L2Regularization()

template<typename AReal >

Real_t TMVA::DNN::TReference< Real_t >::L2Regularization ( const TMatrixT< AReal > &  W )

static

Definition at line 64 of file Regularization.cxx.

MaxPoolLayerBackward()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::MaxPoolLayerBackward ( std::vector< TMatrixT< AReal >> &  activationGradientsBackward, const std::vector< TMatrixT< AReal >> &  activationGradients, const std::vector< TMatrixT< AReal >> &  indexMatrix, size_t  batchSize, size_t  depth, size_t  nLocalViews  )

static

Perform the complete backward propagation step in a Max Pooling Layer.

Based on the winning idices stored in the index matrix, it just forwards the actiovation gradients to the previous layer.

Definition at line 378 of file Propagation.cxx.

MeanSquaredError()

template<typename AReal >

AReal TMVA::DNN::TReference< AReal >::MeanSquaredError ( const TMatrixT< AReal > &  Y, const TMatrixT< AReal > &  output, const TMatrixT< AReal > &  weights  )

static

Definition at line 25 of file LossFunctions.cxx.

MeanSquaredErrorGradients()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::MeanSquaredErrorGradients ( TMatrixT< AReal > &  dY, const TMatrixT< AReal > &  Y, const TMatrixT< AReal > &  output, const TMatrixT< AReal > &  weights  )

static

Definition at line 45 of file LossFunctions.cxx.

MultiplyTranspose()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::MultiplyTranspose ( TMatrixT< Scalar_t > &  output, const TMatrixT< Scalar_t > &  input, const TMatrixT< Scalar_t > &  weights  )

static

Matrix-multiply input with the transpose of and write the results into output.

Definition at line 23 of file Propagation.cxx.

Rearrange()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Rearrange ( std::vector< TMatrixT< AReal >> &  out, const std::vector< TMatrixT< AReal >> &  in  )

static

Rearrage data accoring to time fill B x T x D out with T x B x D matrix in.

Definition at line 446 of file Propagation.cxx.

ReconstructInput()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::ReconstructInput ( TMatrixT< AReal > &  compressedInput, TMatrixT< AReal > &  reconstructedInput, TMatrixT< AReal > &  fWeights  )

static

Definition at line 152 of file DenoisePropagation.cxx.

RecurrentLayerBackward()

template<typename Scalar_t >

auto TMVA::DNN::TReference< Scalar_t >::RecurrentLayerBackward ( TMatrixT< Scalar_t > &  state_gradients_backward, TMatrixT< Scalar_t > &  input_weight_gradients, TMatrixT< Scalar_t > &  state_weight_gradients, TMatrixT< Scalar_t > &  bias_gradients, TMatrixT< Scalar_t > &  df, const TMatrixT< Scalar_t > &  state, const TMatrixT< Scalar_t > &  weights_input, const TMatrixT< Scalar_t > &  weights_state, const TMatrixT< Scalar_t > &  input, TMatrixT< Scalar_t > &  input_gradient  )

static

Backpropagation step for a Recurrent Neural Network.

Definition at line 26 of file RecurrentPropagation.cxx.

Relu()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::Relu ( TMatrixT< AReal > &  B )

static

Definition at line 43 of file ActivationFunctions.cxx.

ReluDerivative()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::ReluDerivative ( TMatrixT< AReal > &  B, const TMatrixT< AReal > &  A  )

inlinestatic

Definition at line 58 of file ActivationFunctions.cxx.

Reshape()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Reshape ( TMatrixT< AReal > &  A, const TMatrixT< AReal > &  B  )

static

Transform the matrix B to a matrix with different dimensions A.

Definition at line 403 of file Propagation.cxx.

RotateWeights()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::RotateWeights ( TMatrixT< AReal > &  A, const TMatrixT< AReal > &  B, size_t  filterDepth, size_t  filterHeight, size_t  filterWidth, size_t  numFilters  )

static

Rotates the matrix B, which is representing a weights, and stores them in the matrix A.

Definition at line 155 of file Propagation.cxx.

ScaleAdd() [1/2]

template<typename AReal >

void TMVA::DNN::TReference< AReal >::ScaleAdd ( TMatrixT< Scalar_t > &  A, const TMatrixT< Scalar_t > &  B, Scalar_t  beta = 1.0  )

static

Adds a the elements in matrix B scaled by c to the elements in the matrix A.

This is required for the weight update in the gradient descent step.

Definition at line 76 of file Propagation.cxx.

ScaleAdd() [2/2]

template<typename AReal >

void TMVA::DNN::TReference< AReal >::ScaleAdd ( std::vector< TMatrixT< Scalar_t >> &  A, const std::vector< TMatrixT< Scalar_t >> &  B, Scalar_t  beta = 1.0  )

static

Above functions extended to vectors.

Definition at line 92 of file Propagation.cxx.

SetRandomSeed()

template<typename Real_t >

void TMVA::DNN::TReference< Real_t >::SetRandomSeed ( size_t  seed )

static

Definition at line 29 of file Initialization.cxx.

Sigmoid() [1/2]

template<typename AReal >

static void TMVA::DNN::TReference< AReal >::Sigmoid ( TMatrixT< AReal > &  B )

static

Sigmoid() [2/2]

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Sigmoid ( TMatrixT< AReal > &  YHat, const TMatrixT< AReal > &  A  )

static

Definition at line 21 of file OutputFunctions.cxx.

SigmoidDerivative()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::SigmoidDerivative ( TMatrixT< AReal > &  B, const TMatrixT< AReal > &  A  )

inlinestatic

Definition at line 92 of file ActivationFunctions.cxx.

Softmax()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::Softmax ( TMatrixT< AReal > &  YHat, const TMatrixT< AReal > &  A  )

static

Definition at line 37 of file OutputFunctions.cxx.

SoftmaxAE()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::SoftmaxAE ( TMatrixT< AReal > &  A )

static

Definition at line 85 of file DenoisePropagation.cxx.

SoftmaxCrossEntropy()

template<typename AReal >

AReal TMVA::DNN::TReference< AReal >::SoftmaxCrossEntropy ( const TMatrixT< AReal > &  Y, const TMatrixT< AReal > &  output, const TMatrixT< AReal > &  weights  )

static

Softmax transformation is implicitly applied, thus output should hold the linear activations of the last layer in the net.

Definition at line 107 of file LossFunctions.cxx.

SoftmaxCrossEntropyGradients()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::SoftmaxCrossEntropyGradients ( TMatrixT< AReal > &  dY, const TMatrixT< AReal > &  Y, const TMatrixT< AReal > &  output, const TMatrixT< AReal > &  weights  )

static

Definition at line 131 of file LossFunctions.cxx.

SoftSign()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::SoftSign ( TMatrixT< AReal > &  B )

inlinestatic

Definition at line 173 of file ActivationFunctions.cxx.

SoftSignDerivative()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::SoftSignDerivative ( TMatrixT< AReal > &  B, const TMatrixT< AReal > &  A  )

inlinestatic

Definition at line 189 of file ActivationFunctions.cxx.

SumColumns()

template<typename AReal >

void TMVA::DNN::TReference< AReal >::SumColumns ( TMatrixT< AReal > &  B, const TMatrixT< AReal > &  A  )

static

Sum columns of (m x n) matrixx A and write the results into the first m elements in A.

Definition at line 108 of file Propagation.cxx.

SymmetricRelu()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::SymmetricRelu ( TMatrixT< AReal > &  B )

inlinestatic

Definition at line 142 of file ActivationFunctions.cxx.

SymmetricReluDerivative()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::SymmetricReluDerivative ( TMatrixT< AReal > &  B, const TMatrixT< AReal > &  A  )

inlinestatic

Definition at line 157 of file ActivationFunctions.cxx.

Tanh()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::Tanh ( TMatrixT< AReal > &  B )

inlinestatic

Definition at line 109 of file ActivationFunctions.cxx.

TanhDerivative()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::TanhDerivative ( TMatrixT< AReal > &  B, const TMatrixT< AReal > &  A  )

inlinestatic

Definition at line 125 of file ActivationFunctions.cxx.

UpdateParams()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::UpdateParams ( TMatrixT< AReal > &  x, TMatrixT< AReal > &  tildeX, TMatrixT< AReal > &  y, TMatrixT< AReal > &  z, TMatrixT< AReal > &  fVBiases, TMatrixT< AReal > &  fHBiases, TMatrixT< AReal > &  fWeights, TMatrixT< AReal > &  VBiasError, TMatrixT< AReal > &  HBiasError, AReal  learningRate, size_t  fBatchSize  )

static

Definition at line 48 of file DenoisePropagation.cxx.

UpdateParamsLogReg()

template<typename AReal >

void TMVA::DNN::TReference< Real_t >::UpdateParamsLogReg ( TMatrixT< AReal > &  input, TMatrixT< AReal > &  output, TMatrixT< AReal > &  difference, TMatrixT< AReal > &  p, TMatrixT< AReal > &  fWeights, TMatrixT< AReal > &  fBiases, AReal  learningRate, size_t  fBatchSize  )

static

Definition at line 191 of file DenoisePropagation.cxx.

Member Data Documentation

fgRandomGen

template<typename AReal >

TRandom * TMVA::DNN::TReference< Real_t >::fgRandomGen = nullptr

staticprivate

Definition at line 46 of file Reference.h.

Libraries for TMVA::DNN::TReference< AReal >:

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