1 | // $Id: Kernel_MEV.h 527 2006-03-01 11:23:53Z peter $ |
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2 | |
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3 | #ifndef _theplu_classifier_kernel_mev_ |
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4 | #define _theplu_classifier_kernel_mev_ |
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5 | |
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6 | #include <c++_tools/classifier/DataLookup1D.h> |
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7 | #include <c++_tools/classifier/Kernel.h> |
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8 | #include <c++_tools/classifier/KernelFunction.h> |
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9 | #include <c++_tools/gslapi/vector.h> |
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10 | #include <c++_tools/gslapi/matrix.h> |
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11 | |
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12 | namespace theplu { |
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13 | namespace classifier { |
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14 | |
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15 | /// |
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16 | /// @brief Memory Efficient Kernel |
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17 | /// Class taking care of the \f$NxN\f$ kernel matrix, where |
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18 | /// \f$N\f$ is number of samples. Type of Kernel is defined by a |
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19 | /// KernelFunction. This Memory Efficient Version (MEV) does not |
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20 | /// store the kernel matrix in memory, but calculates each element |
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21 | /// when it is needed. When memory allows do always use Kernel_SEV |
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22 | /// instead. |
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23 | /// |
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24 | /// @see also Kernel_SEV |
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25 | /// |
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26 | class Kernel_MEV : public Kernel |
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27 | { |
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28 | |
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29 | public: |
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30 | |
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31 | /// |
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32 | /// Constructor taking the data matrix and KernelFunction as |
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33 | /// input.Each column in the data matrix corresponds to one |
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34 | /// sample. @note Can not handle NaNs. |
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35 | /// |
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36 | inline Kernel_MEV(const MatrixLookup& data, const KernelFunction& kf) |
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37 | : Kernel(data,kf) {} |
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38 | |
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39 | /// |
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40 | /// Destructor |
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41 | /// |
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42 | inline virtual ~Kernel_MEV(void) {}; |
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43 | |
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44 | /// |
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45 | /// @return Element at position (\a row, \a column) of the Kernel |
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46 | /// matrix |
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47 | /// |
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48 | double operator()(const size_t row, const size_t column) const; |
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49 | |
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50 | /// |
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51 | /// @return kernel element between data @a ve and training sample @a i |
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52 | /// |
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53 | //inline double element(const gslapi::vector& vec, const size_t i) const |
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54 | //{ return kf_->operator()(vec, gslapi::vector(data_,i)); } |
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55 | |
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56 | |
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57 | private: |
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58 | /// |
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59 | /// Copy constructor (not implemented) |
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60 | /// |
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61 | Kernel_MEV(const Kernel_MEV&); |
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62 | |
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63 | }; // class Kernel_MEV |
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64 | |
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65 | }} // of namespace classifier and namespace theplu |
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66 | |
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67 | #endif |
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