mlpack_amf_NMFALSUpdate (3)

Public Member Functions

NMFALSUpdate ()

template<typename MatType > void Initialize (const MatType &dataset, const size_t rank)

Static Public Member Functions

template<typename MatType > static void HUpdate (const MatType &V, const arma::mat &W, arma::mat &H)

The update rule for the encoding matrix H. template<typename MatType > static void WUpdate (const MatType &V, arma::mat &W, const arma::mat &H)

The update rule for the basis matrix W.

The alternating least square update rules of matrices W and H.

Definition at line 39 of file nmf_als.hpp.

mlpack::amf::NMFALSUpdate::NMFALSUpdate ()\fC [inline]\fP

Definition at line 43 of file nmf_als.hpp.

template<typename MatType > static void mlpack::amf::NMFALSUpdate::HUpdate (const MatType &V, const arma::mat &W, arma::mat &H)\fC [inline]\fP, \fC [static]\fP

The update rule for the encoding matrix H. The formula used is \[ H = ac{W^TV}{W^TW} \] The function takes in all the matrices and only changes the value of the H matrix.

Parameters:

V Input matrix to be factorized.

W Basis matrix.

H Encoding matrix to be updated.

Definition at line 96 of file nmf_als.hpp.

template<typename MatType > void mlpack::amf::NMFALSUpdate::Initialize (const MatType &dataset, const size_trank)\fC [inline]\fP

Definition at line 46 of file nmf_als.hpp.

template<typename MatType > static void mlpack::amf::NMFALSUpdate::WUpdate (const MatType &V, arma::mat &W, const arma::mat &H)\fC [inline]\fP, \fC [static]\fP

The update rule for the basis matrix W. The formula used is \[ W^T = ac{HV^T}{HH^T} \] The function takes in all the matrices and only changes the value of the W matrix.

Parameters:

V Input matrix to be factorized.

W Basis matrix to be updated.

H Encoding matrix.

Definition at line 65 of file nmf_als.hpp.

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