DotProductKernel.cc

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 1998 Pascal Vincent
// Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
// Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal
// Copyright (C) 2002 Xiangdong Wang, Christian Dorion

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/* *******************************************************      
   * $Id: DotProductKernel.cc,v 1.6 2004/04/07 23:15:17 morinf Exp $
   * This file is part of the PLearn library.
   ******************************************************* */

#include "DotProductKernel.h"

namespace PLearn {
using namespace std;


PLEARN_IMPLEMENT_OBJECT(DotProductKernel, "ONE LINE DESCR", "NO HELP");

real DotProductKernel::evaluate(const Vec& x1, const Vec& x2) const
{ return dot(x1,x2); }


real DotProductKernel::evaluate_i_j(int i, int j) const
{ return data->dot(i,j,data_inputsize); }


real DotProductKernel::evaluate_i_x(int i, const Vec& x, real squared_norm_of_x) const 
{ return data->dot(i,x); } 


real DotProductKernel::evaluate_x_i(const Vec& x, int i, real squared_norm_of_x) const
{ return data->dot(i,x); } 

} // end of namespace PLearn

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