gaussianradialbasiskerneltest.java

来自「一个自然语言处理的Java开源工具包。LingPipe目前已有很丰富的功能」· Java 代码 · 共 39 行

package com.aliasi.test.unit.matrix;

import com.aliasi.matrix.GaussianRadialBasisKernel;
import com.aliasi.matrix.DenseVector;
import com.aliasi.matrix.SparseFloatVector;
import com.aliasi.matrix.Vector;

import com.aliasi.util.AbstractExternalizable;

import com.aliasi.test.unit.BaseTestCase;

import java.io.IOException;

public class GaussianRadialBasisKernelTest extends BaseTestCase {

    public void testOne() throws ClassNotFoundException, IOException {
        Vector v1 = new DenseVector(new double[] { -1, 2, 3 });
        Vector v2 = new DenseVector(new double[] { 5, -7, 9 });

        GaussianRadialBasisKernel kernel1
            = new GaussianRadialBasisKernel(2.0);

        GaussianRadialBasisKernel kernel2
            = (GaussianRadialBasisKernel)
            AbstractExternalizable
            .serializeDeserialize(kernel1);

        double expectedv1v2 = Math.exp(-2.0 * Math.sqrt(36 +81 +36));
        assertEquals(expectedv1v2,
                     kernel1.proximity(v1,v2),
                     0.0001);
        assertEquals(expectedv1v2,
                     kernel2.proximity(v2,v1),
                     0.0001);


    }

}