multiDimNoisyAND_tpl.h

Go to the documentation of this file.

/****************************************************************************
 *   This file is part of the aGrUM/pyAgrum library.                        *
 *                                                                          *
 *   Copyright (c) 2005-2025 by                                             *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
 *                                                                          *
 *   The aGrUM/pyAgrum library is free software; you can redistribute it    *
 *   and/or modify it under the terms of either :                           *
 *                                                                          *
 *    - the GNU Lesser General Public License as published by               *
 *      the Free Software Foundation, either version 3 of the License,      *
 *      or (at your option) any later version,                              *
 *    - the MIT license (MIT),                                              *
 *    - or both in dual license, as here.                                   *
 *                                                                          *
 *   (see https://agrum.gitlab.io/articles/dual-licenses-lgplv3mit.html)    *
 *                                                                          *
 *   This aGrUM/pyAgrum library is distributed in the hope that it will be  *
 *   useful, but WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,          *
 *   INCLUDING BUT NOT LIMITED TO THE WARRANTIES MERCHANTABILITY or FITNESS *
 *   FOR A PARTICULAR PURPOSE  AND NONINFRINGEMENT. IN NO EVENT SHALL THE   *
 *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
 *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,        *
 *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR  *
 *   OTHER DEALINGS IN THE SOFTWARE.                                        *
 *                                                                          *
 *   See LICENCES for more details.                                         *
 *                                                                          *
 *   SPDX-FileCopyrightText: Copyright 2005-2025                            *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
 *   SPDX-License-Identifier: LGPL-3.0-or-later OR MIT                      *
 *                                                                          *
 *   Contact  : info_at_agrum_dot_org                                       *
 *   homepage : http://agrum.gitlab.io                                      *
 *   gitlab   : https://gitlab.com/agrumery/agrum                           *
 *                                                                          *
 ****************************************************************************/
#pragma once
 

 
#include <agrum/base/core/exceptions.h>
#include <agrum/base/multidim/ICIModels/multiDimNoisyAND.h>
 
namespace gum {
 
  // Default constructor
  template < typename GUM_SCALAR >
  INLINE MultiDimNoisyAND< GUM_SCALAR >::MultiDimNoisyAND(GUM_SCALAR external_weight,
                                                          GUM_SCALAR default_weight) :
      MultiDimICIModel< GUM_SCALAR >(external_weight, default_weight) {
    if (external_weight == 0) {
      GUM_ERROR(InvalidArgument, "external weight can not be null for a NoisyAND")
    }
 
    GUM_CONSTRUCTOR(MultiDimNoisyAND);
  }
 
  // Default constructor
  template < typename GUM_SCALAR >
  INLINE
      MultiDimNoisyAND< GUM_SCALAR >::MultiDimNoisyAND(const MultiDimNoisyAND< GUM_SCALAR >& from) :
      MultiDimICIModel< GUM_SCALAR >(from) {
    GUM_CONS_CPY(MultiDimNoisyAND);
  }
 
  // Copy constructor using a bijection to replace variables from source.
  template < typename GUM_SCALAR >
  INLINE MultiDimNoisyAND< GUM_SCALAR >::MultiDimNoisyAND(
      const Bijection< const DiscreteVariable*, const DiscreteVariable* >& bij,
      const MultiDimNoisyAND< GUM_SCALAR >& from) : MultiDimICIModel< GUM_SCALAR >(bij, from) {
    GUM_CONSTRUCTOR(MultiDimNoisyAND);
  }
 
  // destructor
  template < typename GUM_SCALAR >
  INLINE MultiDimNoisyAND< GUM_SCALAR >::~MultiDimNoisyAND() {
    GUM_DESTRUCTOR(MultiDimNoisyAND);
  }
 
  template < typename GUM_SCALAR >
  GUM_SCALAR MultiDimNoisyAND< GUM_SCALAR >::get(const Instantiation& i) const {
    if (this->nbrDim() < 1) {
      GUM_ERROR(OperationNotAllowed, "Not enough variable for a NoisyAND ")
    }
 
    const DiscreteVariable& C = this->variable((Idx)0);
 
    if (i.val(C) > 1) return (GUM_SCALAR)0.0;
 
    GUM_SCALAR fact = this->externalWeight();
 
    for (Idx j = 1; j < this->nbrDim(); j++) {
      const DiscreteVariable& v = this->variable(j);
 
      if (i.val(v) == 0) {
        fact *= ((GUM_SCALAR)1.0 - this->causalWeight(v));
      } else {
        fact *= this->causalWeight(v);
      }
    }
 
    return (i.val(C) == 1) ? fact : (GUM_SCALAR)1.0 - fact;
  }
 
  template < typename GUM_SCALAR >
  std::string MultiDimNoisyAND< GUM_SCALAR >::toString() const {
    std::stringstream s;
    s << MultiDimImplementation< GUM_SCALAR >::variable(0) << "=noisyAND(["
      << this->externalWeight() << "]";
 
    for (Idx i = 1; i < MultiDimImplementation< GUM_SCALAR >::nbrDim(); i++)
      s << ", " << MultiDimImplementation< GUM_SCALAR >::variable(i) << "["
        << this->causalWeight(MultiDimImplementation< GUM_SCALAR >::variable(i)) << "]";
 
    s << ")";
    return s.str();
  }
 
  // For friendly displaying the content of the variable.
 
  template < typename GUM_SCALAR >
  INLINE std::ostream& operator<<(std::ostream& s, const MultiDimNoisyAND< GUM_SCALAR >& ag) {
    return s << ag.toString();
  }
 
  template < typename GUM_SCALAR >
  INLINE MultiDimContainer< GUM_SCALAR >* MultiDimNoisyAND< GUM_SCALAR >::newFactory() const {
    return new MultiDimNoisyAND< GUM_SCALAR >(this->_external_weight_, this->_default_weight_);
  }
 
  // returns the name of the implementation
  template < typename GUM_SCALAR >
  INLINE const std::string& MultiDimNoisyAND< GUM_SCALAR >::name() const {
    static const std::string str = "MultiDimNoisyAND";
    return str;
  }
 
} /* namespace gum */