ext/dsent/model/TransitionInfo.cc

   1 /* Copyright (c) 2012 Massachusetts Institute of Technology
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy
   4  * of this software and associated documentation files (the "Software"), to deal
   5  * in the Software without restriction, including without limitation the rights
   6  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   7  * copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in
  11  * all copies or substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  19  * THE SOFTWARE.
  20  */
  21
  22 #include "model/TransitionInfo.h"
  23
  24 namespace DSENT
  25 {
  26     TransitionInfo::TransitionInfo()
  27         : m_number_transitions_00_(0.25), m_number_transitions_01_(0.25),
  28         m_number_transitions_11_(0.25), m_frequency_multiplier_(1.0)
  29     {
  30         update();
  31     }
  32
  33     TransitionInfo::TransitionInfo(double number_transitions_00_, double number_transitions_01_,
  34             double number_transitions_11_)
  35         : m_number_transitions_00_(number_transitions_00_), m_number_transitions_01_(number_transitions_01_),
  36         m_number_transitions_11_(number_transitions_11_)
  37     {
  38         m_frequency_multiplier_ = m_number_transitions_00_ + 2.0 * m_number_transitions_01_ + m_number_transitions_11_;
  39         update();
  40     }
  41
  42     TransitionInfo::~TransitionInfo()
  43     {}
  44
  45     void TransitionInfo::update()
  46     {
  47         ASSERT(m_number_transitions_00_ >= 0.0, "[Error] Number of 0->0 transitions (" +
  48                 (String)m_number_transitions_00_ + ") must be >= 0.0!");
  49         ASSERT(m_number_transitions_01_ >= 0.0, "[Error] Number of 0->1 transitions (" +
  50                 (String)m_number_transitions_01_ + ") must be >= 0.0!");
  51         ASSERT(m_number_transitions_11_ >= 0.0, "[Error] Number of 1->1 transitions (" + (String)m_number_transitions_11_ + ") must be >= 0.0!");
  52
  53         m_probability_1_ = (m_number_transitions_01_ + m_number_transitions_11_) / m_frequency_multiplier_;
  54         m_probability_0_ = 1.0 - m_probability_1_;
  55         return;
  56     }
  57
  58     TransitionInfo TransitionInfo::scaleFrequencyMultiplier(double frequency_multiplier_) const
  59     {
  60         // A short cut if frequency_multiplier_ == m_frequency_multiplier_ to avoid excess calculations
  61         if(frequency_multiplier_ == m_frequency_multiplier_)
  62         {
  63             return TransitionInfo(m_number_transitions_00_, m_number_transitions_01_, m_number_transitions_11_);
  64         }
  65         else if (frequency_multiplier_ > m_frequency_multiplier_)
  66         {
  67             double freq_ratio = frequency_multiplier_ / m_frequency_multiplier_;
  68             double diff_num_trans_01 = m_number_transitions_01_ * (freq_ratio - 1.0);
  69             double norm_num_trans_00 = m_number_transitions_00_ * freq_ratio + diff_num_trans_01;
  70             double norm_num_trans_01 = m_number_transitions_01_;
  71             double norm_num_trans_11 = m_number_transitions_11_ * freq_ratio + diff_num_trans_01;
  72
  73             return TransitionInfo(norm_num_trans_00, norm_num_trans_01, norm_num_trans_11);
  74         }
  75         else
  76         {
  77             ASSERT(false, "[Error] Cannot scale to frequency multiplier (" + (String) frequency_multiplier_ +
  78                 ") since current frequency multiplier (" + (String) m_frequency_multiplier_ + ") is bigger!");
  79         }
  80     }
  81
  82     void TransitionInfo::print(std::ostream& ost_) const
  83     {
  84         ost_ << "[" << m_number_transitions_00_ << ", " << m_number_transitions_01_ << ", " << m_number_transitions_11_ << "]";
  85         ost_ << " [" << m_number_transitions_00_ / m_frequency_multiplier_;
  86         ost_ << ", " << m_number_transitions_01_*2.0 / m_frequency_multiplier_;
  87         ost_ << ", " << m_number_transitions_11_ / m_frequency_multiplier_ << "]" << endl;
  88         return;
  89     }
  90 } // namespace DSENT
  91