mlpack::amf::AverageInitialization Class Reference

This initialization rule initializes matrix W and H to root of the average of V, perturbed with uniform noise. More...

#include <average_init.hpp>

Public Member Functions
template<typename Archive >
void	serialize (Archive &, const uint32_t)
	Serialize the object (in this case, there is nothing to do).

Static Public Member Functions
template<typename MatType >
static void	Initialize (const MatType &V, const size_t r, arma::mat &W, arma::mat &H)
	Initialize the matrices W and H to the average value of V with uniform random noise added. More...
template<typename MatType >
static void	InitializeOne (const MatType &V, const size_t r, arma::mat &M, const bool whichMatrix=true)
	Initialize the matrix W or H to the average value of V with uniform random noise added. More...

Detailed Description

This initialization rule initializes matrix W and H to root of the average of V, perturbed with uniform noise.

Uniform noise is generated by Armadillo's 'randu' function. For better performance, the lowest element of the matrix is subtracted from the average before dividing it by the factorization rank. This computed value is added with the random noise.

Member Function Documentation

Initialize()

template<typename MatType >

static void mlpack::amf::AverageInitialization::Initialize ( const MatType &  V, const size_t  r, arma::mat &  W, arma::mat &  H  )

inlinestatic

Initialize the matrices W and H to the average value of V with uniform random noise added.

Parameters

V	Input matrix.
r	Rank of matrix.
W	W matrix, to be initialized.
H	H matrix, to be initialized.

InitializeOne()

template<typename MatType >

static void mlpack::amf::AverageInitialization::InitializeOne ( const MatType &  V, const size_t  r, arma::mat &  M, const bool  whichMatrix = true  )

inlinestatic

Initialize the matrix W or H to the average value of V with uniform random noise added.

Parameters

V	Input matrix.
r	Rank of matrix.
M	W or H matrix, to be initialized to the average value of V with uniform random noise added.
whichMatrix	If true, initialize W. Otherwise, initialize H.

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

• src/mlpack/methods/amf/init_rules/average_init.hpp