com.googlecode.fannj.FannTest.java Source code

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Here is the source code for com.googlecode.fannj.FannTest.java

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/* FannJ
 * Copyright (C) 2009 Kyle Renfro
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA. The text of license can be also found
 * at http://www.gnu.org/copyleft/lgpl.html
 */
package com.googlecode.fannj;

import static org.junit.Assert.assertEquals;

import org.apache.commons.io.FileUtils;
import org.apache.tools.ant.DirectoryScanner;
import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;

public class FannTest {

    public static File createTemp(File src) throws IOException {
        File temp = File.createTempFile("fannj_", ".net");
        temp.deleteOnExit();
        FileUtils.copyFile(src, temp);
        return temp;
    }

    public static File build(File res) throws IOException {
        File temp = createTemp(res);
        List<Layer> layers = new ArrayList<Layer>();
        layers.add(Layer.create(2));
        layers.add(Layer.create(3, ActivationFunction.FANN_SIGMOID_SYMMETRIC));
        layers.add(Layer.create(1, ActivationFunction.FANN_SIGMOID_SYMMETRIC));
        Fann fann = new Fann(layers);
        Trainer trainer = new Trainer(fann);
        float desiredError = .001f;
        @SuppressWarnings("unused")
        float mse = trainer.train(temp.getPath(), 500000, 1000, desiredError);
        fann.save(temp.toString());
        assertEquals(0, fann.getErrno());
        return temp;
    }

    @Test
    public void testTrainAndRun() throws IOException {
        File temp = build(glob1("**/xor.data"));
        Fann fann = new Fann(temp.getPath());
        assertEquals(2, fann.getNumInputNeurons());
        assertEquals(1, fann.getNumOutputNeurons());
        assertEquals(-1f, fann.run(new float[] { -1, -1 })[0], .2f);
        assertEquals(1f, fann.run(new float[] { -1, 1 })[0], .2f);
        assertEquals(1f, fann.run(new float[] { 1, -1 })[0], .2f);
        assertEquals(-1f, fann.run(new float[] { 1, 1 })[0], .2f);
        fann.close();
    }

    @Test
    public void testFannGetErrNo() throws IOException, URISyntaxException, InterruptedException {

        File temp = build(glob1("**/xor.data"));
        Fann fann = new Fann(temp.getPath());

        Trainer trainer = new Trainer(fann);
        float desiredError = .001f;
        assertEquals(0, fann.getErrno());

        @SuppressWarnings("unused")
        float mse = trainer.train(new File(FannTest.class.getResource("badTrainingData10.data").toURI()).getPath(),
                500000, 1000, desiredError);
        // TODO not good, filed an issue:
        // https://github.com/libfann/fann/issues/69
        assertEquals(0, fann.getErrno());
    }

    public static void main(String[] args) {
        try {
            new FannTest().testFannGetErrNo();
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }

    }

    public static File glob1(String pattern) throws IOException {
        DirectoryScanner scanner = new DirectoryScanner();
        scanner.setIncludes(new String[] { pattern });
        scanner.setBasedir(System.getProperty("user.dir"));
        scanner.setCaseSensitive(false);
        scanner.scan();
        String[] files = scanner.getIncludedFiles();
        if (files.length == 0) {
            throw new IOException("no match found: " + pattern);
        }
        if (files.length > 1) {
            throw new IOException("multiple matches found: " + pattern);
        }
        return new File(scanner.getBasedir(), files[0]);
    }

}