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MMDKernelSelection.cpp
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1 /*
2  * Copyright (c) The Shogun Machine Learning Toolbox
3  * Written (w) 2012-2013 Heiko Strathmann
4  * Written (w) 2014 Soumyajit De
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright notice, this
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12  * 2. Redistributions in binary form must reproduce the above copyright notice,
13  * this list of conditions and the following disclaimer in the documentation
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16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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30  */
31 
37 
38 using namespace shogun;
39 
41 {
42 }
43 
45  : CKernelSelection(mmd)
46 {
47  /* ensure that mmd contains an instance of a MMD related class
48  TODO - Add S_BTEST_MMD when feature/mmd is merged with develop */
51  "Provided instance for kernel two sample testing has to be a MMD-"
52  "based class! The provided is of class \"%s\"\n", mmd->get_name());
53 }
54 
56 {
57 }
58 
60 {
61  SG_DEBUG("entering\n")
62 
63  /* compute measures and return single kernel with maximum measure */
65 
66  /* find maximum and return corresponding kernel */
67  float64_t max=measures[0];
68  index_t max_idx=0;
69  for (index_t i=1; i<measures.vlen; ++i)
70  {
71  if (measures[i]>max)
72  {
73  max=measures[i];
74  max_idx=i;
75  }
76  }
77 
78  /* find kernel with corresponding index */
80  CKernel* current=combined->get_kernel(max_idx);
81 
82  SG_UNREF(combined);
83  SG_DEBUG("leaving\n");
84 
85  /* current is not SG_UNREF'ed nor SG_REF'ed since the counter needs to be
86  * incremented exactly by one */
87  return current;
88 }
89 
int32_t index_t
Definition: common.h:62
#define REQUIRE(x,...)
Definition: SGIO.h:206
virtual CKernel * select_kernel()
Kernel two sample test base class. Provides an interface for performing a two-sample test using a ker...
index_t vlen
Definition: SGVector.h:494
CKernel * get_kernel(int32_t idx)
double float64_t
Definition: common.h:50
The Combined kernel is used to combine a number of kernels into a single CombinedKernel object by lin...
virtual SGVector< float64_t > compute_measures()=0
virtual const char * get_name() const =0
CKernelTwoSampleTest * m_estimator
#define SG_UNREF(x)
Definition: SGObject.h:52
#define SG_DEBUG(...)
Definition: SGIO.h:107
all of classes and functions are contained in the shogun namespace
Definition: class_list.h:18
Base class for kernel selection for kernel two-sample test statistic implementations (e...
virtual EStatisticType get_statistic_type() const =0
The Kernel base class.
Definition: Kernel.h:158
Matrix::Scalar max(Matrix m)
Definition: Redux.h:66

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