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gnn_gcomm.h

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/***************************************************************************
 *  @file gnn_gcomm.h
 *  @brief gnn_gcomm Header File.
 *
 *  @date   : 28-09-03 21:09
 *  @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_GCOMM_H_
#define _GNN_GCOMM_H_

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

#include "gnn_node.h"



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

/**
 * @brief The structure for a \ref gnn_gcomm node.
 * @ingroup gnn_gcomm_doc
 *
 * This datatype holds the information for a \ref gnn_gcomm node.
 * Basically, it extends the \ref gnn_node with special pointers to get fast
 * accesses to the needed vector slices.
 */
typedef struct _gnn_gcomm gnn_gcomm;

struct _gnn_gcomm
{
    gnn_node node;            /**< Subyacent \ref gnn_node.                */

    size_t rep;               /**< Amount of replications to the input.    */
    double sumw;              /**< Last \f$ \sum_k w_k^2 \f$.              */
    gsl_vector *alpha;        /**< The last computed \f$\alpha_k\f$.       */
    
    gsl_vector *xbuf;         /**< The total working buffer.               */

    gsl_vector_view x_view;   /**< The input view of the buffer.           */
    gsl_vector *x;            /**< A pointer to the input buffer slice.    */

    gsl_vector_view *X_view;  /**< Array of subvector views of the buffer. */
    gsl_vector **X;           /**< Array of the buffer's subvectors.       */
};



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

gnn_node *
gnn_gcomm_new (size_t input_size, size_t output_size);



#endif /* _GNN_GCOMM_H_ */

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