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src
shogun
loss
HingeLoss.h
浏览该文件的文档.
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/*
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Copyright (c) 2009 Yahoo! Inc. All rights reserved. The copyrights
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embodied in the content of this file are licensed under the BSD
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(revised) open source license.
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Copyright (c) 2011 Berlin Institute of Technology and Max-Planck-Society.
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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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Modifications (w) 2011 Shashwat Lal Das
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Modifications (w) 2012 Fernando José Iglesias García
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*/
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#ifndef _HINGELOSS_H__
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#define _HINGELOSS_H__
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#include <
shogun/loss/LossFunction.h
>
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namespace
shogun
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{
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class
CHingeLoss
:
public
CLossFunction
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{
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public
:
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CHingeLoss
():
CLossFunction
() {};
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~CHingeLoss
() {};
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float64_t
loss
(
float64_t
prediction,
float64_t
label);
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float64_t
loss
(
float64_t
z);
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virtual
float64_t
first_derivative
(
float64_t
prediction,
float64_t
label);
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virtual
float64_t
first_derivative
(
float64_t
z);
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virtual
float64_t
second_derivative
(
float64_t
prediction,
float64_t
label);
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virtual
float64_t
second_derivative
(
float64_t
z);
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virtual
float64_t
get_update
(
float64_t
prediction,
float64_t
label,
float64_t
eta_t,
float64_t
norm
);
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virtual
float64_t
get_square_grad
(
float64_t
prediction,
float64_t
label);
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virtual
ELossType
get_loss_type
() {
return
L_HINGELOSS
; }
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virtual
const
char
*
get_name
()
const
{
return
"HingeLoss"
; }
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};
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}
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#endif
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