Examples with RecordReader org.datavec.api.records.reader.RecordReader used on opensource projects

Example 6 with RecordReader

use of org.datavec.api.records.reader.RecordReader in project deeplearning4j by deeplearning4j.

the class MultipleEpochsIteratorTest method testNextAndReset.

@Test
public void testNextAndReset() throws Exception {
    int epochs = 3;
    RecordReader rr = new CSVRecordReader();
    rr.initialize(new FileSplit(new ClassPathResource("iris.txt").getFile()));
    DataSetIterator iter = new RecordReaderDataSetIterator(rr, 150);
    MultipleEpochsIterator multiIter = new MultipleEpochsIterator(epochs, iter);
    assertTrue(multiIter.hasNext());
    while (multiIter.hasNext()) {
        DataSet path = multiIter.next();
        assertFalse(path == null);
    }
    assertEquals(epochs, multiIter.epochs);
}

Example 7 with RecordReader

use of org.datavec.api.records.reader.RecordReader in project deeplearning4j by deeplearning4j.

the class MultipleEpochsIteratorTest method testLoadFullDataSet.

@Test
public void testLoadFullDataSet() throws Exception {
    int epochs = 3;
    RecordReader rr = new CSVRecordReader();
    rr.initialize(new FileSplit(new ClassPathResource("iris.txt").getFile()));
    DataSetIterator iter = new RecordReaderDataSetIterator(rr, 150);
    DataSet ds = iter.next(50);
    MultipleEpochsIterator multiIter = new MultipleEpochsIterator(epochs, ds);
    assertTrue(multiIter.hasNext());
    while (multiIter.hasNext()) {
        DataSet path = multiIter.next();
        assertEquals(path.numExamples(), 50, 0.0);
        assertFalse(path == null);
    }
    assertEquals(epochs, multiIter.epochs);
}

Example 8 with RecordReader

use of org.datavec.api.records.reader.RecordReader in project deeplearning4j by deeplearning4j.

the class RecordReaderMultiDataSetIteratorTest method testSplittingCSVMeta.

@Test
public void testSplittingCSVMeta() throws Exception {
    //Here's the idea: take Iris, and split it up into 2 inputs and 2 output arrays
    //Inputs: columns 0 and 1-2
    //Outputs: columns 3, and 4->OneHot
    RecordReader rr2 = new CSVRecordReader(0, ",");
    rr2.initialize(new FileSplit(new ClassPathResource("iris.txt").getTempFileFromArchive()));
    RecordReaderMultiDataSetIterator rrmdsi = new RecordReaderMultiDataSetIterator.Builder(10).addReader("reader", rr2).addInput("reader", 0, 0).addInput("reader", 1, 2).addOutput("reader", 3, 3).addOutputOneHot("reader", 4, 3).build();
    rrmdsi.setCollectMetaData(true);
    int count = 0;
    while (rrmdsi.hasNext()) {
        MultiDataSet mds = rrmdsi.next();
        MultiDataSet fromMeta = rrmdsi.loadFromMetaData(mds.getExampleMetaData(RecordMetaData.class));
        assertEquals(mds, fromMeta);
        count++;
    }
    assertEquals(150 / 10, count);
}

Example 9 with RecordReader

use of org.datavec.api.records.reader.RecordReader in project deeplearning4j by deeplearning4j.

the class RecordReaderMultiDataSetIteratorTest method testSplittingCSV.

@Test
public void testSplittingCSV() throws Exception {
    //Here's the idea: take Iris, and split it up into 2 inputs and 2 output arrays
    //Inputs: columns 0 and 1-2
    //Outputs: columns 3, and 4->OneHot
    //need to manually extract
    RecordReader rr = new CSVRecordReader(0, ",");
    rr.initialize(new FileSplit(new ClassPathResource("iris.txt").getTempFileFromArchive()));
    RecordReaderDataSetIterator rrdsi = new RecordReaderDataSetIterator(rr, 10, 4, 3);
    RecordReader rr2 = new CSVRecordReader(0, ",");
    rr2.initialize(new FileSplit(new ClassPathResource("iris.txt").getTempFileFromArchive()));
    MultiDataSetIterator rrmdsi = new RecordReaderMultiDataSetIterator.Builder(10).addReader("reader", rr2).addInput("reader", 0, 0).addInput("reader", 1, 2).addOutput("reader", 3, 3).addOutputOneHot("reader", 4, 3).build();
    while (rrdsi.hasNext()) {
        DataSet ds = rrdsi.next();
        INDArray fds = ds.getFeatureMatrix();
        INDArray lds = ds.getLabels();
        MultiDataSet mds = rrmdsi.next();
        assertEquals(2, mds.getFeatures().length);
        assertEquals(2, mds.getLabels().length);
        assertNull(mds.getFeaturesMaskArrays());
        assertNull(mds.getLabelsMaskArrays());
        INDArray[] fmds = mds.getFeatures();
        INDArray[] lmds = mds.getLabels();
        assertNotNull(fmds);
        assertNotNull(lmds);
        for (int i = 0; i < fmds.length; i++) assertNotNull(fmds[i]);
        for (int i = 0; i < lmds.length; i++) assertNotNull(lmds[i]);
        //Get the subsets of the original iris data
        INDArray expIn1 = fds.get(NDArrayIndex.all(), NDArrayIndex.point(0));
        INDArray expIn2 = fds.get(NDArrayIndex.all(), NDArrayIndex.interval(1, 2, true));
        INDArray expOut1 = fds.get(NDArrayIndex.all(), NDArrayIndex.point(3));
        INDArray expOut2 = lds;
        assertEquals(expIn1, fmds[0]);
        assertEquals(expIn2, fmds[1]);
        assertEquals(expOut1, lmds[0]);
        assertEquals(expOut2, lmds[1]);
    }
    assertFalse(rrmdsi.hasNext());
}

Example 10 with RecordReader

use of org.datavec.api.records.reader.RecordReader in project deeplearning4j by deeplearning4j.

the class TestSparkComputationGraph method testBasic.

@Test
public void testBasic() throws Exception {
    JavaSparkContext sc = this.sc;
    RecordReader rr = new CSVRecordReader(0, ",");
    rr.initialize(new FileSplit(new ClassPathResource("iris.txt").getTempFileFromArchive()));
    MultiDataSetIterator iter = new RecordReaderMultiDataSetIterator.Builder(1).addReader("iris", rr).addInput("iris", 0, 3).addOutputOneHot("iris", 4, 3).build();
    List<MultiDataSet> list = new ArrayList<>(150);
    while (iter.hasNext()) list.add(iter.next());
    ComputationGraphConfiguration config = new NeuralNetConfiguration.Builder().optimizationAlgo(OptimizationAlgorithm.STOCHASTIC_GRADIENT_DESCENT).learningRate(0.1).graphBuilder().addInputs("in").addLayer("dense", new DenseLayer.Builder().nIn(4).nOut(2).build(), "in").addLayer("out", new OutputLayer.Builder(LossFunctions.LossFunction.MCXENT).nIn(2).nOut(3).build(), "dense").setOutputs("out").pretrain(false).backprop(true).build();
    ComputationGraph cg = new ComputationGraph(config);
    cg.init();
    TrainingMaster tm = new ParameterAveragingTrainingMaster(true, numExecutors(), 1, 10, 1, 0);
    SparkComputationGraph scg = new SparkComputationGraph(sc, cg, tm);
    scg.setListeners(Collections.singleton((IterationListener) new ScoreIterationListener(1)));
    JavaRDD<MultiDataSet> rdd = sc.parallelize(list);
    scg.fitMultiDataSet(rdd);
    //Try: fitting using DataSet
    DataSetIterator iris = new IrisDataSetIterator(1, 150);
    List<DataSet> list2 = new ArrayList<>();
    while (iris.hasNext()) list2.add(iris.next());
    JavaRDD<DataSet> rddDS = sc.parallelize(list2);
    scg.fit(rddDS);
}