source: trunk/lib/classifier/KernelLookup.cc @ 545

// $Id: KernelLookup.cc 545 2006-03-06 13:35:45Z peter $

#include <c++_tools/classifier/KernelLookup.h>
#include <c++_tools/classifier/DataLookup2D.h>


#include <cassert>
#ifndef NDEBUG
#include <algorithm>
#endif 

namespace theplu {
namespace classifier {  

  KernelLookup::KernelLookup(const Kernel& kernel, const bool own)
    : DataLookup2D(own), kernel_(&kernel)
  {
    column_index_.reserve(kernel.size());
    for(size_t i=0; i<kernel.size(); i++)
      column_index_.push_back(i);
    row_index_=column_index_;
  }
  
  KernelLookup::KernelLookup(const Kernel& kernel,
                             const std::vector<size_t>& row, 
                             const std::vector<size_t>& column)
    : DataLookup2D(row,column), kernel_(&kernel)
  {
    // Checking that each row index is less than kernel.rows()
    assert(row.empty() || 
           *(std::max_element(row.begin(),row.end()))<kernel.rows());
    // Checking that each column index is less than kernel.column()
    assert(column.empty() || 
           *(std::max_element(column.begin(),column.end()))<kernel.columns());

  }


  KernelLookup::KernelLookup(const KernelLookup& kernel, 
                             const std::vector<size_t>& row, 
                             const std::vector<size_t>& column)
    : DataLookup2D(kernel,row,column), kernel_(kernel.kernel_)
  {
  }
  

  KernelLookup::KernelLookup(const KernelLookup& kernel)
    : DataLookup2D(kernel), kernel_(kernel.kernel_)
  {
  }
  

  KernelLookup::~KernelLookup(void)
  {
    if (owner_)
      delete kernel_;
  }

  const KernelLookup* 
  KernelLookup::training_data(const std::vector<size_t>& train) const
  { 
    return new KernelLookup(*this,train,train); 
  } 


  const KernelLookup* 
  KernelLookup::validation_data(const std::vector<size_t>& train, 
                                const std::vector<size_t>& validation) const
  { 
    return new KernelLookup(*this,train,validation); 
  } 

  const MatrixLookup* KernelLookup::weights(void) const
  { return new MatrixLookup(kernel_->weights(),column_index_); }

  const KernelLookup* 
  KernelLookup::selected(const std::vector<size_t>& index) const
  {
    const Kernel* kernel = kernel_->selected(index);
    return new KernelLookup(*kernel, true);
  }

}} // of namespace classifier and namespace theplu