source: trunk/c++_tools/classifier/Kernel_SEV.h @ 651

Last change on this file since 651 was 651, checked in by Peter, 15 years ago

corrected dox in Kernel classes

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date ID
File size: 2.0 KB
Line 
1#ifndef _theplu_classifier_kernel_sev_
2#define _theplu_classifier_kernel_sev_
3
4// $Id$
5
6#include <c++_tools/classifier/Kernel.h>
7#include <c++_tools/utility/matrix.h>
8
9
10namespace theplu {
11namespace classifier {
12
13  class DataLookup1D;
14  class KernelFunction;
15
16  ///
17  ///   @brief Speed Efficient Kernel
18  ///
19  ///   Class taking care of the \f$ NxN \f$ kernel matrix, where
20  ///   \f$ N \f$ is number of samples. Type of Kernel is defined by a
21  ///   KernelFunction. This Speed Efficient Version (SEV) calculated
22  ///   the kernel matrix once by construction and the kernel is stored in
23  ///   memory. When \f$ N \f$ is large and the kernel matrix cannot be
24  ///   stored in memory, use Kernel_MEV instead.
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 KernelWeighted_SEV instead.
35    ///
36    Kernel_SEV(const MatrixLookup&, const KernelFunction&);
37   
38    ///
39    /// Constructor taking the data matrix and KernelFunction as
40    /// input. @note Can not handle NaNs. When dealing with missing values,
41    /// use KernelWeighted_SEV instead.
42    ///
43    Kernel_SEV(const MatrixLookupWeighted&, const KernelFunction&);
44   
45    ///
46    /// Constructs a Kernel based on selected features defined by @a index
47    ///
48    Kernel_SEV(const Kernel_SEV& kernel, const std::vector<size_t>& index);
49
50    ///
51    /// @return element at position (\a row, \a column) in the Kernel
52    /// matrix
53    ///
54    inline double operator()(const size_t row,const size_t column) const
55    { return kernel_matrix_(row,column); }
56
57    ///
58    /// @todo doc
59    ///
60    const Kernel* selected(const std::vector<size_t>& index) const;
61
62  private:
63    ///
64    /// Copy constructor (not implemented)
65    ///
66    Kernel_SEV(const Kernel_SEV&);
67    const Kernel_SEV& operator=(const Kernel_SEV&);
68
69    void build_kernel(void);
70
71    utility::matrix kernel_matrix_;
72
73  }; // class Kernel_SEV
74
75}} // of namespace classifier and namespace theplu
76
77#endif
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