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src
shogun
kernel
LinearKernel.h
Go to the documentation of this file.
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* Written (W) 1999-2010 Soeren Sonnenburg
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* Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
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* Copyright (C) 2010 Berlin Institute of Technology
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*/
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#ifndef _LINEARKERNEL_H___
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#define _LINEARKERNEL_H___
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#include <
shogun/lib/common.h
>
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#include <
shogun/kernel/DotKernel.h
>
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#include <
shogun/features/DotFeatures.h
>
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#include <
shogun/machine/KernelMachine.h
>
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namespace
shogun
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{
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class
CKernelMachine;
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class
CDotFeatures;
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class
CLinearKernel
:
public
CDotKernel
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{
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public
:
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CLinearKernel
();
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CLinearKernel
(
CDotFeatures
* l,
CDotFeatures
* r);
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virtual
~CLinearKernel
();
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virtual
bool
init
(
CFeatures
* l,
CFeatures
* r);
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virtual
void
cleanup
();
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virtual
EKernelType
get_kernel_type
() {
return
K_LINEAR
; }
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virtual
const
char
*
get_name
()
const
{
return
"LinearKernel"
; }
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virtual
bool
init_optimization
(
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int32_t num_suppvec, int32_t* sv_idx,
float64_t
* alphas);
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virtual
bool
init_optimization
(
CKernelMachine
* km);
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virtual
bool
delete_optimization
();
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virtual
float64_t
compute_optimized
(int32_t idx);
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virtual
void
clear_normal
();
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virtual
void
add_to_normal
(int32_t idx,
float64_t
weight);
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inline
const
float64_t
*
get_normal
(int32_t& len)
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{
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if
(
lhs
&&
normal
)
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{
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len = ((
CDotFeatures
*)
lhs
)->get_dim_feature_space();
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return
normal
;
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}
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else
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{
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len = 0;
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return
NULL;
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}
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}
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inline
void
get_w
(
float64_t
** dst_w, int32_t* dst_dims)
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{
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ASSERT
(
lhs
&&
normal
);
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int32_t len = ((
CDotFeatures
*)
lhs
)->get_dim_feature_space();
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ASSERT
(dst_w && dst_dims);
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*dst_dims=len;
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*dst_w=
SG_MALLOC
(
float64_t
, *dst_dims);
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ASSERT
(*dst_w);
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memcpy(*dst_w,
normal
,
sizeof
(
float64_t
) * (*dst_dims));
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}
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inline
void
set_w
(
float64_t
* src_w, int32_t src_w_dim)
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{
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ASSERT
(
lhs
&& src_w_dim==((
CDotFeatures
*)
lhs
)->get_dim_feature_space());
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clear_normal
();
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memcpy(
normal
, src_w,
sizeof
(
float64_t
) * src_w_dim);
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}
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protected
:
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float64_t
*
normal
;
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int32_t
normal_length
;
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};
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}
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#endif
/* _LINEARKERNEL_H__ */
SHOGUN
Machine Learning Toolbox - Documentation