source: trunk/lib/classifier/Kernel_SEV.h @ 513

Last change on this file since 513 was 513, checked in by Peter, 16 years ago

added kernels using weights

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 1.6 KB
Line 
1// $Id: Kernel_SEV.h 513 2006-02-18 16:02:43Z peter $
2
3#ifndef _theplu_classifier_kernel_sev_
4#define _theplu_classifier_kernel_sev_
5
6#include <c++_tools/classifier/Kernel.h>
7#include <c++_tools/gslapi/matrix.h>
8
9
10namespace theplu {
11namespace classifier {
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    ///  Default constructor (not implemented)
33    ///
34    Kernel_SEV(void);
35
36    ///
37    ///   Constructor taking the data matrix and KernelFunction as
38    ///   input. @note Can not handle NaNs. When dealing with missing values,
39    ///   use constructor taking a weight matrix.
40    Kernel_SEV(const gslapi::matrix&, const KernelFunction&);
41   
42    ///
43    /// Copy constructor (not implemented)
44    ///
45    Kernel_SEV(const Kernel_SEV&);
46
47    ///
48    ///   Destructor
49    ///
50    inline virtual ~Kernel_SEV(void) {};
51
52    ///
53    /// @return element at position (\a row, \a column) in the Kernel
54    /// matrix
55    ///
56    inline double operator()(const size_t row,const size_t column) const
57    { return kernel_matrix_(row,column); }
58
59  private:
60    gslapi::matrix kernel_matrix_;
61
62  }; // class Kernel_SEV
63
64}} // of namespace classifier and namespace theplu
65
66#endif
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