source: trunk/test/normalization_test.cc @ 1750

Last change on this file since 1750 was 1750, checked in by Peter, 12 years ago

added a compilation test for qQN::operator() with weighted iterators. refs #478

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1// $Id: normalization_test.cc 1750 2009-01-26 12:45:27Z peter $
2
3/*
4  Copyright (C) 2008, 2009 Jari Häkkinen, Peter Johansson
5
6  This file is part of the yat library, http://dev.thep.lu.se/yat
7
8  The yat library is free software; you can redistribute it and/or
9  modify it under the terms of the GNU General Public License as
10  published by the Free Software Foundation; either version 3 of the
11  License, or (at your option) any later version.
12
13  The yat library is distributed in the hope that it will be useful,
14  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  General Public License for more details.
17
18  You should have received a copy of the GNU General Public License
19  along with yat. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "Suite.h"
23
24#include "yat/normalizer/Centralizer.h"
25#include "yat/normalizer/ColumnNormalizer.h"
26#include "yat/normalizer/Gauss.h"
27#include "yat/normalizer/qQuantileNormalizer.h"
28#include "yat/normalizer/QuantileNormalizer.h"
29#include "yat/normalizer/RowNormalizer.h"
30#include "yat/normalizer/Spearman.h"
31#include "yat/normalizer/Zscore.h"
32
33#include "yat/utility/DataIterator.h"
34#include "yat/utility/FileUtil.h"
35#include "yat/utility/Matrix.h"
36#include "yat/utility/MatrixWeighted.h"
37#include "yat/utility/WeightIterator.h"
38
39#include <fstream>
40#include <limits>
41#include <vector>
42
43using namespace theplu::yat;
44void test_centralizer(test::Suite&);
45void test_column_normalize(test::Suite&);
46void test_gauss_normalize(test::Suite&);
47void test_qquantile_normalize(test::Suite&);
48void test_qquantile_normalize_weighted(test::Suite&);
49void test_quantile_normalize(test::Suite&);
50void test_row_normalize(test::Suite&);
51void test_spearman(test::Suite&);
52void test_spearman_weighted(test::Suite&);
53void test_z_score(test::Suite&);
54
55int main(int argc, char* argv[])
56{ 
57  test::Suite suite(argc, argv);
58  suite.err() << "testing normalizations ... " << std::endl;
59
60  test_centralizer(suite);
61  test_column_normalize(suite);
62  test_qquantile_normalize(suite);
63  test_qquantile_normalize_weighted(suite);
64  test_quantile_normalize(suite);
65  test_gauss_normalize(suite);
66  test_row_normalize(suite);
67  test_spearman(suite);
68  test_z_score(suite);
69
70  return suite.return_value();
71}
72
73
74void test_centralizer(test::Suite& suite)
75{
76  suite.err() << "Testing Centralizer\n";
77  std::vector<double> vec;
78  vec.push_back(1);
79  vec.push_back(2);
80  vec.push_back(3);
81  normalizer::Centralizer<> c;
82  c(vec.begin(), vec.end(), vec.begin());
83  for (size_t i=0; i<vec.size(); ++i)
84    suite.add(suite.equal(vec[i], static_cast<double>(i)-1.0));
85
86  std::vector<utility::DataWeight> vec2;
87  vec2.push_back(utility::DataWeight(1,1));
88  vec2.push_back(utility::DataWeight(2,0.5));
89  vec2.push_back(utility::DataWeight(2,0.5));
90  std::vector<utility::DataWeight> vec3(vec2.size());
91  c(vec2.begin(), vec2.end(), vec3.begin());
92  for (size_t i=0; i<vec2.size(); ++i)
93    suite.add(suite.equal(vec3[i].weight(), vec2[i].weight()));
94  suite.add(suite.equal(vec3[0].data(), -0.5));
95  suite.add(suite.equal(vec3[1].data(), 0.5));
96  suite.add(suite.equal(vec3[2].data(), 0.5));
97
98}
99
100
101void test_column_normalize(test::Suite& suite)
102{
103  using namespace normalizer;
104  suite.err() << "Testing ColumnNormalizer\n";
105 
106  utility::Matrix m(2,2);
107  m(0,0) = 0;
108  m(0,1) = 10;
109  m(1,0) = 2;
110  m(1,1) = 4;
111  ColumnNormalizer<Centralizer<> > qn;
112  qn(m, m);
113  suite.err() << "Testing m(0,0)\n";
114  suite.add(suite.equal(m(0,0), -1));
115  suite.err() << "Testing m(0,1)\n";
116  suite.add(suite.equal(m(0,1), 3));
117  suite.err() << "Testing m(1,0)\n";
118  suite.add(suite.equal(m(1,0), 1));
119  suite.err() << "Testing m(1,1)\n";
120  suite.add(suite.equal(m(1,1), -3));
121}
122
123
124void test_qquantile_normalize(test::Suite& suite)
125{
126  using namespace normalizer;
127
128  suite.err() << "Testing qQuantileNormalizer\n";
129  std::string data(test::filename("data/normalization_test.data"));
130  if (utility::FileUtil(data.c_str()).permissions("r")) {
131    suite.add(false);
132    suite.err() << "Cannot access file " << data << '\n';
133    return;
134  }
135  std::ifstream data_stream(data.c_str());
136
137  utility::Matrix m(data_stream);
138
139  suite.err() << "testing number of parts (Q) boundary conditions\n";
140  qQuantileNormalizer(m.begin_column(0), m.end_column(0), m.rows());
141  qQuantileNormalizer(m.begin_column(0), m.end_column(0), 3);
142
143  // first column as target
144  qQuantileNormalizer qqn(m.begin_column(0), m.end_column(0) ,9); 
145  ColumnNormalizer<qQuantileNormalizer> cn(qqn);
146  utility::Matrix result(m.rows(),m.columns());
147  cn(m, result);
148
149  suite.err() << "test that result can be stored in the source matrix\n";
150  cn(m,m);
151  suite.add(result==m);
152
153  // Enough iteration will make all columns to have the same values as
154  // the target.
155  suite.err() << "Testing that q=matrix rows gives QuantileNormalization\n";
156  utility::Matrix m2(4,2);
157  m2(0,0) = 0; m2(0,1) = 10;
158  m2(1,0) = 2; m2(1,1) = 4;
159  m2(2,0) = 1; m2(2,1) = 0;
160  m2(3,0) = 3; m2(3,1) = 7;
161  qQuantileNormalizer qqn2(m2.begin_column(0), m2.end_column(0), m2.rows());
162  ColumnNormalizer<qQuantileNormalizer> cn2(qqn2);
163  utility::Matrix result2(m2.rows(),m2.columns());
164  cn2(m2,result2);
165  suite.add( suite.equal_fix(m2(0,0),result2(2,1),1.0e-12) &&
166             suite.equal_fix(m2(1,0),result2(3,1),1.0e-12) &&
167             suite.equal_fix(m2(2,0),result2(1,1),1.0e-12) &&
168             suite.equal_fix(m2(3,0),result2(0,1),1.0e-12) );
169}
170
171
172void test_qquantile_normalize_weighted(test::Suite& suite)
173{
174  using namespace normalizer;
175
176  suite.err() << "Testing qQuantileNormalizer weighted\n";
177
178  std::vector<utility::DataWeight> vec;
179  vec.reserve(100);
180  for (size_t i=0; i<100; ++i)
181    vec.push_back(utility::DataWeight(i, 1.0));
182  qQuantileNormalizer qQN(vec.begin(), vec.end(), 5);
183  qQN(vec.begin(), vec.end(), vec.begin());
184}
185
186
187void test_quantile_normalize(test::Suite& suite)
188{
189  suite.err() << "Testing QuantileNormalizer\n";
190 
191  utility::Matrix m(2,2);
192  m(0,0) = 0;
193  m(0,1) = 10;
194  m(1,0) = 2;
195  m(1,1) = 4;
196  normalizer::QuantileNormalizer qn;
197  qn(m, m);
198  suite.err() << "Testing m(0,0)\n";
199  suite.add(suite.equal(m(0,0), 2));
200  suite.err() << "Testing m(0,1)\n";
201  suite.add(suite.equal(m(0,1), 6));
202  suite.err() << "Testing m(1,0)\n";
203  suite.add(suite.equal(m(1,0), 6));
204  suite.err() << "Testing m(1,1)\n";
205  suite.add(suite.equal(m(1,1), 2));
206}
207
208void test_row_normalize(test::Suite& suite)
209{
210  using namespace normalizer;
211  suite.err() << "Testing RowNormalizer\n";
212 
213  utility::Matrix m(2,3);
214  m(0,0) = 0;
215  m(0,1) = 10;
216  m(1,0) = 2;
217  m(1,1) = 4;
218  utility::Matrix m2(m);
219  m2.transpose();
220  ColumnNormalizer<Centralizer<> > cn;
221  RowNormalizer<Centralizer<> > rn;
222  cn(m, m);
223  rn(m2, m2);
224  m2.transpose();
225  suite.equal_range(m.begin(), m.end(), m2.begin());
226}
227
228void test_spearman(test::Suite& suite)
229{
230  suite.err() << "Testing Spearman\n";
231  normalizer::Spearman spearman;
232  std::vector<double> vec;
233  vec.push_back(0);
234  vec.push_back(2);
235  vec.push_back(3);
236  vec.push_back(1);
237  spearman(vec.begin(), vec.end(), vec.begin());
238  std::vector<double> correct;
239  correct.push_back(1.0/8);
240  correct.push_back(5.0/8);
241  correct.push_back(7.0/8);
242  correct.push_back(3.0/8);
243  suite.add(suite.equal_range(vec.begin(), vec.end(), correct.begin()));
244  suite.err() << "Testing Spearman with ties\n";
245  vec[1]=vec[2];
246  correct[1] = correct[2] = (correct[1]+correct[2])/2;
247  spearman(vec.begin(), vec.end(), vec.begin());
248  suite.add(suite.equal_range(vec.begin(), vec.end(), correct.begin()));
249  test_spearman_weighted(suite);
250}
251
252
253void test_gauss_normalize(test::Suite& suite)
254{
255  suite.err() << "Testing Gauss\n";
256  normalizer::Gauss gauss;
257  std::vector<double> vec;
258  vec.push_back(1);
259  gauss(vec.begin(), vec.end(), vec.begin());
260  suite.add(suite.equal(vec.front(), 0));
261  vec.push_back(1);
262  gauss(vec.begin(), vec.end(), vec.begin());
263  suite.add(suite.equal(vec.front(), -vec.back()));
264
265}
266
267void test_spearman_weighted(test::Suite& suite)
268{
269  suite.err() << "Testing Weighted Spearman\n";
270  normalizer::Spearman spearman;
271
272  suite.err() << "Testing that unity weights reproduces unweighted case\n";
273  utility::MatrixWeighted m(1,4,0,1);
274  utility::MatrixWeighted res(m.rows(), m.columns(),3.14,0);
275  m(0,0).data()=0;
276  m(0,1).data()=2;
277  m(0,2).data()=3;
278  m(0,3).data()=1;
279  std::vector<double> correct(m.columns());
280  std::vector<double> correct_w(m.columns(), 1.0);
281  std::copy(utility::data_iterator(m.begin_row(0)),
282            utility::data_iterator(m.end_row(0)),
283            correct.begin());
284  spearman(correct.begin(), correct.end(), correct.begin());
285  spearman(m.begin_row(0), m.end_row(0), res.begin_row(0));
286
287  using utility::data_iterator;
288  suite.add(suite.equal_range(data_iterator(res.begin_row(0)),
289                               data_iterator(res.end_row(0)),
290                               correct.begin()));
291  using utility::weight_iterator;
292  suite.add(suite.equal_range(weight_iterator(res.begin_row(0)),
293                               weight_iterator(res.end_row(0)),
294                               correct_w.begin()));
295
296  suite.err() << "Testing rescaling of weights\n";
297  for (size_t i=0; i<m.columns(); ++i) {
298    m(0,i).weight() *= 2;
299    correct_w[i] *= 2;
300  }   
301  spearman(m.begin_row(0), m.end_row(0), res.begin_row(0));
302  suite.add(suite.equal_range(data_iterator(res.begin_row(0)),
303                               data_iterator(res.end_row(0)),
304                               correct.begin()));
305  suite.add(suite.equal_range(weight_iterator(res.begin_row(0)),
306                               weight_iterator(res.end_row(0)),
307                               correct_w.begin()));
308
309 
310  suite.err() << "Testing case with a zero weight\n";
311  m(0,1).data() = std::numeric_limits<double>::quiet_NaN();
312  m(0,1).weight() = 0.0;
313  spearman(m.begin_row(0), m.end_row(0), res.begin_row(0));
314  suite.add(suite.equal(res(0,0).data(), 0.5/3)); 
315  suite.add(suite.equal(res(0,2).data(), 2.5/3)); 
316  suite.add(suite.equal(res(0,3).data(), 1.5/3)); 
317
318  suite.err() << "Testing case with ties\n";
319  m(0,0).data() = m(0,2).data();
320  spearman(m.begin_row(0), m.end_row(0), res.begin_row(0));
321  suite.add(suite.equal(res(0,0).data(), 2.0/3)); 
322  suite.add(suite.equal(res(0,2).data(), 2.0/3)); 
323  suite.add(suite.equal(res(0,3).data(), 0.5/3)); 
324}
325
326void test_z_score(test::Suite& suite)
327{
328  suite.err() << "Testing Zscore\n";
329  std::vector<double> vec;
330  vec.push_back(0);
331  vec.push_back(3.14);
332  normalizer::Zscore zscore;
333  zscore(vec.begin(), vec.end(), vec.begin());
334  for (size_t i=0; i<vec.size(); ++i)
335    suite.add(suite.equal(vec[i], 2.0*i-1.0));
336
337  std::vector<utility::DataWeight> vec2;
338  vec2.push_back(utility::DataWeight(1,1));
339  vec2.push_back(utility::DataWeight(2.13,0.5));
340  vec2.push_back(utility::DataWeight(2.13,0.5));
341  std::vector<utility::DataWeight> vec3(vec2.size());
342  zscore(vec2.begin(), vec2.end(), vec3.begin());
343  for (size_t i=0; i<vec2.size(); ++i)
344    suite.add(suite.equal(vec3[i].weight(), vec2[i].weight()));
345  suite.add(suite.equal(vec3[0].data(), -1.0));
346  suite.add(suite.equal(vec3[1].data(), 1.0));
347  suite.add(suite.equal(vec3[2].data(), 1.0));
348}
349
350
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