TDTrainer.h

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/*
 * TDTrainer.h
 *
 * (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TDTRAINER_H_
#define TDTRAINER_H_

#include <qualia/core/common.h>
#include <qualia/core/Action.h>
#include <qualia/learning/Trainer.h>
#include <qualia/rl/QFunction.h>
#include <qualia/rl/RLObservation.h>

class TDTrainer : public Trainer {
public:
  real* eTraces;

  // Configurable parameters /////

  // NOTICE: These parameters can be changed during the course of learning, although the user must be
  // aware of the consequences on learning (which might be severely hampered).

  float gamma;

  float lambda;

  bool offPolicy;

  Action bufferAction;
  unsigned int observationDim;
  unsigned int actionDim;

  TDTrainer(QFunction* qFunction,
            unsigned int observationDim, ActionProperties* actionProperties,
            float lambda, float gamma, bool offPolicy=false);
  virtual ~TDTrainer();

  virtual void init();

  virtual void step(const RLObservation* lastObservation, const Action* lastAction,
                    const RLObservation* observation,     const Action* action);
};

#endif /* TDTRAINER_H_ */