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gnn_gaussian.h

Go to the documentation of this file.

/***************************************************************************
 *  @file gnn_gaussian.h
 *  @brief Gaussian Kernel transfer function.
 *
 *  @date   : 18-09-03 10:33
 *  @author : Pedro Ortega C. <peortega@dcc.uchile.cl>
 *  Copyright  2003  Pedro Ortega C.
 ****************************************************************************/
/*
 *  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 2 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 Library General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef _GNN_GUASSIAN_H_
#define _GNN_GUASSIAN_H_

/******************************************/
/* Include Files                          */
/******************************************/

#include "gnn_node.h"



/******************************************/
/* Typedefs                               */
/******************************************/

/**
 * @brief The structure for a \ref gnn_gaussian node.
 * @ingroup gnn_gaussian_doc
 *
 * This datatype holds the information for a \ref gnn_gaussian node.
 * Basically, it extends the \ref gnn_node with special pointers to get fast
 * accesses to the amplitudes and variances.
 */
typedef struct _gnn_gaussian gnn_gaussian;

struct _gnn_gaussian
{
    gnn_node node;                   /**< Subyacent \ref gnn_node.       */
    
    gsl_vector_view a_view;          /**< View to the amplitudes.             */
    gsl_vector_view da_view;         /**< View to teh amplitude gradients.    */
    gsl_vector_int_view af_view;     /**< View to the amplitude freeze flags. */
    
    gsl_vector *y;                   /**< Buffer for outputs.                 */
    
    gsl_vector_view v_view;          /**< View to the variances.              */
    gsl_vector_view dv_view;         /**< View to the variance gradients.     */
    gsl_vector_int_view vf_view;     /**< View to the variance freeze flags.  */
    
    gsl_vector     *a;       /**< Pointer to the amplitude vector.       */
    gsl_vector     *da;      /**< Pointer to the amplitude gradients.    */
    gsl_vector_int *af;      /**< Pointer to the amplitude freeze flags. */
    gsl_vector     *v;       /**< Pointer to the variance vector.        */
    gsl_vector     *dv;      /**< Pointer to the variance gradients.     */
    gsl_vector_int *vf;      /**< Pointer to the variance freeze flags.  */
};



/******************************************/
/* Public Interface                       */
/******************************************/

gnn_node *
gnn_gaussian_new (int input_size, double a, double sigma);

gnn_node *
gnn_gaussian_standard_new (int input_size);

#endif /* _GNN_GUASSIAN_H_ */

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