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MPR.h
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MPR.h
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#pragma once
#include "model.h"
class MPR : public model
{
public:
MPR(corpus* corp, int K, double lambda, double biasReg, double alpha)
: model(corp)
, K(K)
, lambda(lambda)
, biasReg(biasReg)
, alpha(alpha) {}
~MPR() {}
void init();
void cleanUp();
double prediction(int user, int item);
void getParametersFromVector(double* g, double** beta_user, double** beta_item, double*** gamma_user, double*** gamma_item, action_t action);
int sampleItem();
int sampleUser();
void train(int iterations, double learn_rate, double alpha);
virtual void oneiteration(double learn_rate, double alpha);
virtual void updateFactors(int user_id, int pos_item_id, int neg_item_id, int item_id, int pos_user_id, int neg_user_id, double learn_rate, double alpha);
string toString();
/* auxiliary variables */
double * beta_item;
double * beta_user;
double ** gamma_user;
double ** gamma_item;
/* hyper-parameters */
int K;
double lambda;
double biasReg;
double alpha;
};