1 | #ifndef theplu_yat_statistics_pearson_vector_distance_h |
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2 | #define theplu_yat_statistics_pearson_vector_distance_h |
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3 | |
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4 | // $Id$ |
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5 | |
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6 | #include "vector_distance.h" |
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7 | |
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8 | #include "AveragerPair.h" |
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9 | |
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10 | namespace theplu { |
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11 | namespace yat { |
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12 | |
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13 | namespace statistics { |
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14 | |
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15 | /// |
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16 | /// Provides a "label" for |
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17 | /// the Pearson distance measure. |
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18 | /// |
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19 | struct pearson_vector_distance_tag |
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20 | : public vector_distance_tag |
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21 | { |
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22 | typedef pearson_vector_distance_tag distance; |
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23 | }; |
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24 | |
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25 | |
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26 | /// |
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27 | /// implementation for distances between vectors |
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28 | /// (containers with random access iterators) using a Pearson |
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29 | /// distance measure and iterators to unweighted containers. |
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30 | /// |
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31 | template <class Iter> |
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32 | double vector_distance(Iter beg1,Iter end1, Iter beg2, |
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33 | const pearson_vector_distance_tag& disttype, |
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34 | std::random_access_iterator_tag) |
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35 | { |
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36 | AveragerPair ap; |
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37 | add(ap,beg1,end1,beg2); |
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38 | return 1-ap.correlation(); |
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39 | } |
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40 | |
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41 | /// |
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42 | /// implementation for distances between vectors |
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43 | /// (containers with random access iterators) using a Pearson |
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44 | /// distance measure and iterators to unweighted containers. |
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45 | /// |
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46 | template <class Iter> |
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47 | double vector_distance(Iter beg1,Iter end1, Iter beg2, |
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48 | const pearson_vector_distance_tag& disttype, |
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49 | std::weighted_random_access_iterator_tag) |
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50 | { |
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51 | AveragerPairWeighted ap; |
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52 | add(ap,beg1,end1,beg2); |
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53 | return 1-ap.correlation(); |
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54 | } |
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55 | |
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56 | |
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57 | }}} // of namespace statistics, yat, and theplu |
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58 | |
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59 | #endif |
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