mlpack_amf_NMFMultiplicativeDivergenceUpdate (3)

Public Member Functions

NMFMultiplicativeDivergenceUpdate ()

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.

Definition at line 40 of file nmf_mult_div.hpp.

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

Definition at line 44 of file nmf_mult_div.hpp.

template<typename MatType > static void mlpack::amf::NMFMultiplicativeDivergenceUpdate::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 \[ H_{a\mu} \leftarrow H_{a\mu} ac{\sum_{i} W_{ia} V_{i\mu}/(WH)_{i\mu}} {\sum_{k} H_{ka}} \] 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 updated.

Definition at line 109 of file nmf_mult_div.hpp.

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

Definition at line 47 of file nmf_mult_div.hpp.

template<typename MatType > static void mlpack::amf::NMFMultiplicativeDivergenceUpdate::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 \[ W_{ia} \leftarrow W_{ia} ac{\sum_{\mu} H_{a\mu} V_{i\mu}/(WH)_{i\mu}} {\sum_{\nu} H_{a\nu}} \] 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 67 of file nmf_mult_div.hpp.

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