com.clust4j.sample.BootstrapTest.java Source code

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Here is the source code for com.clust4j.sample.BootstrapTest.java

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/*******************************************************************************
 *    Copyright 2015, 2016 Taylor G Smith
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 *******************************************************************************/
package com.clust4j.sample;

import static org.junit.Assert.*;

import java.util.Arrays;

import org.apache.commons.math3.linear.Array2DRowRealMatrix;
import org.junit.Test;

import com.clust4j.utils.MatrixFormatter;

public class BootstrapTest {
    final static MatrixFormatter formatter = new MatrixFormatter();

    static Array2DRowRealMatrix toMatrix(final double[][] data) {
        return new Array2DRowRealMatrix(data, false);
    }

    public static void printMatrix(final double[][] d) {
        System.out.println(formatter.format(toMatrix(d)));
    }

    public static void printArray(final double[] d) {
        System.out.println(Arrays.toString(d));
    }

    @Test
    public void testUniform() {
        final double[][] data = new double[][] { new double[] { 1, 2, 3, 4, 5 }, new double[] { 9, 8, 7, 6, 5 },
                new double[] { 1, 0, 2, 9, 3 } };

        final double[][] sampled = Bootstrapper.BASIC.sample(data, 8);
        assertTrue(sampled.length == 8);
    }

    @Test
    public void testSmooth() {
        final double[][] data = new double[][] { new double[] { 1, 2, 3, 4, 5 }, new double[] { 9, 8, 7, 6, 5 },
                new double[] { 1, 0, 2, 9, 3 }, new double[] { 90, 18, 2, 0.4, 2 } };

        final double[][] sampled = Bootstrapper.SMOOTH.sample(data, 8);
        printMatrix(sampled);
        assertTrue(sampled.length == 8);
    }

}