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SquaredLoss.h
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1 /*
2  Copyright (c) 2009 Yahoo! Inc. All rights reserved. The copyrights
3  embodied in the content of this file are licensed under the BSD
4  (revised) open source license.
5 
6  Copyright (c) 2011 Berlin Institute of Technology and Max-Planck-Society.
7 
8  This program is free software; you can redistribute it and/or modify
9  it under the terms of the GNU General Public License as published by
10  the Free Software Foundation; either version 3 of the License, or
11  (at your option) any later version.
12 
13  Modifications (w) 2011 Shashwat Lal Das
14  Modifications (w) 2012 Fernando José Iglesias García
15 */
16 
17 #ifndef _SQUAREDLOSS_H__
18 #define _SQUAREDLOSS_H__
19 
20 #include <shogun/lib/config.h>
21 
23 
24 namespace shogun
25 {
30 {
31 public:
36 
41 
50  float64_t loss(float64_t prediction, float64_t label);
51 
60 
69  float64_t first_derivative(float64_t prediction, float64_t label);
70 
79 
89 
98 
109  virtual float64_t get_update(float64_t prediction, float64_t label, float64_t eta_t, float64_t norm);
110 
119  virtual float64_t get_square_grad(float64_t prediction, float64_t label);
120 
126  virtual ELossType get_loss_type() { return L_SQUAREDLOSS; }
127 
128  virtual const char* get_name() const { return "SquaredLoss"; }
129 };
130 
131 }
132 
133 #endif

SHOGUN Machine Learning Toolbox - Documentation