mirror of https://github.com/jlizier/jidt
82 lines
2.8 KiB
Java
Executable File
82 lines
2.8 KiB
Java
Executable File
/*
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* Java Information Dynamics Toolkit (JIDT)
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* Copyright (C) 2012, Joseph T. Lizier
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package infodynamics.measures.continuous.kernel;
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import infodynamics.utils.ArrayFileReader;
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import infodynamics.utils.MatrixUtils;
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import junit.framework.TestCase;
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public class ActiveInfoStorageTester extends TestCase {
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public void testEmbedding() throws Exception {
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ArrayFileReader afr = new ArrayFileReader("demos/data/2coupledRandomCols-1.txt");
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double[][] data = afr.getDouble2DMatrix();
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int[] ks = {1,2,3,4};
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int[] taus = {1,2,3,4};
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for (int kIndex = 0; kIndex < ks.length; kIndex++) {
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int k = ks[kIndex];
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for (int tauIndex = 0; tauIndex < taus.length; tauIndex++) {
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int tau = taus[tauIndex];
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ActiveInfoStorageCalculatorKernel ais = new ActiveInfoStorageCalculatorKernel();
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ais.initialise(k, tau, 0.5);
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ais.setObservations(MatrixUtils.selectColumn(data, 0));
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assertEquals(data.length - (k-1)*tau - 1,
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ais.getNumObservations());
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}
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}
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}
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public void testAgainstDirectAISCalculator() throws Exception {
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int[] ks = {1,2,3,4};
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double[] kernelwidths = {0.2, 0.5, 1};
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ArrayFileReader afr = new ArrayFileReader("demos/data/2coupledRandomCols-1.txt");
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double[][] data = afr.getDouble2DMatrix();
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for (int kIndex = 0; kIndex < ks.length; kIndex++) {
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int k = ks[kIndex];
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for (int kwIndex = 0; kwIndex < kernelwidths.length; kwIndex++) {
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double kernelwidth = kernelwidths[kwIndex];
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ActiveInfoStorageCalculatorKernelDirect aisOld = new ActiveInfoStorageCalculatorKernelDirect();
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aisOld.initialise(k, kernelwidth);
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aisOld.setObservations(MatrixUtils.selectColumn(data, 0));
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double aisOldValue = aisOld.computeAverageLocalOfObservations();
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ActiveInfoStorageCalculatorKernel aisNew = new ActiveInfoStorageCalculatorKernel();
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aisNew.initialise(k, kernelwidth);
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aisNew.setObservations(MatrixUtils.selectColumn(data, 0));
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double aisNewValue = aisNew.computeAverageLocalOfObservations();
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System.out.printf("k=%d, kw=%.2f, Kernel calculator: %.5f bits; Direct kernel calculator: %.5f bits\n",
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k, kernelwidth, aisNewValue, aisOldValue);
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assertEquals(aisOldValue, aisNewValue, 0.00000001);
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}
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}
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}
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}
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