1 | // $Id: Kernel_SEV.h 330 2005-06-01 21:30:47Z peter $ |
---|

2 | |
---|

3 | #ifndef _theplu_svm_kernel_sev_ |
---|

4 | #define _theplu_svm_kernel_sev_ |
---|

5 | |
---|

6 | #include <c++_tools/gslapi/matrix.h> |
---|

7 | #include <c++_tools/svm/Kernel.h> |
---|

8 | |
---|

9 | |
---|

10 | namespace theplu { |
---|

11 | namespace svm { |
---|

12 | |
---|

13 | class KernelFunction; |
---|

14 | |
---|

15 | /// |
---|

16 | /// @brief Speed Efficient Kernel |
---|

17 | /// Class taking care of the \f$NxN\f$ kernel matrix, where |
---|

18 | /// \f$N\f$ is number of samples. Type of Kernel is defined by a |
---|

19 | /// KernelFunction. This Speed Efficient Version (SEV) calculated |
---|

20 | /// the kernel matrix once and the kernel is stored in |
---|

21 | /// memory. When \f$N\f$ is large and the kernel matrix cannot be |
---|

22 | /// stored in memory, use Kernel_MEV instead. |
---|

23 | /// |
---|

24 | /// @see also Kernel_MEV |
---|

25 | /// |
---|

26 | class Kernel_SEV : public Kernel |
---|

27 | { |
---|

28 | |
---|

29 | public: |
---|

30 | |
---|

31 | /// |
---|

32 | /// Constructor taking the data matrix and KernelFunction as |
---|

33 | /// input. @note Can not handle NaNs. When dealing with missing values, |
---|

34 | /// use constructor taking a weight matrix. |
---|

35 | Kernel_SEV(const gslapi::matrix&, const KernelFunction&); |
---|

36 | |
---|

37 | /// |
---|

38 | /// @todo |
---|

39 | /// Copy constructor |
---|

40 | /// |
---|

41 | Kernel_SEV(const Kernel_SEV&); |
---|

42 | |
---|

43 | /// |
---|

44 | /// Destructor |
---|

45 | /// |
---|

46 | virtual ~Kernel_SEV(void); |
---|

47 | |
---|

48 | /// |
---|

49 | /// @return element at position (\a row, \a column) in the Kernel |
---|

50 | /// matrix |
---|

51 | /// |
---|

52 | inline double operator()(const size_t row,const size_t column) const |
---|

53 | { return kernel_matrix_(row,column); } |
---|

54 | |
---|

55 | private: |
---|

56 | gslapi::matrix kernel_matrix_; |
---|

57 | |
---|

58 | }; // class Kernel_SEV |
---|

59 | |
---|

60 | }} // of namespace svm and namespace theplu |
---|

61 | |
---|

62 | #endif |
---|