NeuralRectifiedLinearLayer.h

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/*
 * Copyright (c) 2014, Shogun Toolbox Foundation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:

 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 *
 * Written (W) 2014 Khaled Nasr
 */

#ifndef __NEURALRECTIFIEDLINEARLAYER_H__
#define __NEURALRECTIFIEDLINEARLAYER_H__

#include <shogun/neuralnets/NeuralLinearLayer.h>

namespace shogun
{
class CNeuralRectifiedLinearLayer : public CNeuralLinearLayer
{
public:
    CNeuralRectifiedLinearLayer();

    CNeuralRectifiedLinearLayer(int32_t num_neurons);

    virtual ~CNeuralRectifiedLinearLayer() {}

    virtual void compute_activations(SGVector<float64_t> parameters,
            CDynamicObjectArray* layers);

    virtual float64_t compute_contraction_term(SGVector<float64_t> parameters);

    virtual void compute_contraction_term_gradients(
        SGVector<float64_t> parameters, SGVector<float64_t> gradients);

    virtual void compute_local_gradients(SGMatrix<float64_t> targets);

    virtual const char* get_name() const { return "NeuralRectifiedLinearLayer"; }
};

}
#endif