1 | // $Id: KNN_ReciprocalRank.cc 2881 2012-11-18 01:28:05Z peter $ |
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2 | |
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3 | /* |
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4 | Copyright (C) 2008 Jari Häkkinen, Peter Johansson, Markus Ringnér |
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5 | |
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6 | This file is part of the yat library, http://dev.thep.lu.se/yat |
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7 | |
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8 | The yat library is free software; you can redistribute it and/or |
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9 | modify it under the terms of the GNU General Public License as |
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10 | published by the Free Software Foundation; either version 3 of the |
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11 | License, or (at your option) any later version. |
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12 | |
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13 | The yat library is distributed in the hope that it will be useful, |
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14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | General Public License for more details. |
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17 | |
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18 | You should have received a copy of the GNU General Public License |
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19 | along with yat. If not, see <http://www.gnu.org/licenses/>. |
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20 | */ |
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21 | |
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22 | #include <config.h> |
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23 | |
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24 | #include "KNN_ReciprocalRank.h" |
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25 | #include "Target.h" |
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26 | |
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27 | #include "yat/utility/VectorBase.h" |
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28 | #include "yat/utility/VectorMutable.h" |
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29 | |
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30 | #include <cmath> |
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31 | #include <vector> |
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32 | |
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33 | namespace theplu { |
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34 | namespace yat { |
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35 | namespace classifier { |
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36 | |
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37 | void KNN_ReciprocalRank::operator()(const utility::VectorBase& distance, |
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38 | const std::vector<size_t>& k_sorted, |
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39 | const Target& target, |
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40 | utility::VectorMutable& prediction) const |
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41 | { |
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42 | for(size_t j=0;j<k_sorted.size();j++) |
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43 | if(!std::isinf(distance(k_sorted[j]))) |
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44 | prediction(target(k_sorted[j]))+=1.0/(j+1); |
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45 | } |
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46 | |
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47 | }}} |
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