org.datavec.api.records.writer.impl.csv.CSVRecordWriter Java Examples

The following examples show how to use org.datavec.api.records.writer.impl.csv.CSVRecordWriter. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: CSVRecordWriterTest.java    From DataVec with Apache License 2.0 5 votes vote down vote up 
@Test
public void testWrite() throws Exception {
    File tempFile = File.createTempFile("datavec", "writer");
    tempFile.deleteOnExit();
    FileSplit fileSplit = new FileSplit(tempFile);
    CSVRecordWriter writer = new CSVRecordWriter();
    writer.initialize(fileSplit,new NumberOfRecordsPartitioner());
    List<Writable> collection = new ArrayList<>();
    collection.add(new Text("12"));
    collection.add(new Text("13"));
    collection.add(new Text("14"));

    writer.write(collection);

    CSVRecordReader reader = new CSVRecordReader(0);
    reader.initialize(new FileSplit(tempFile));
    int cnt = 0;
    while (reader.hasNext()) {
        List<Writable> line = new ArrayList<>(reader.next());
        assertEquals(3, line.size());

        assertEquals(12, line.get(0).toInt());
        assertEquals(13, line.get(1).toInt());
        assertEquals(14, line.get(2).toInt());
        cnt++;
    }
    assertEquals(1, cnt);
}
Example #2
Source File: CSVRecordReaderTest.java    From DataVec with Apache License 2.0 5 votes vote down vote up 
@Test
public void testWrite() throws Exception {
    List<List<Writable>> list = new ArrayList<>();
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < 10; i++) {
        List<Writable> temp = new ArrayList<>();
        for (int j = 0; j < 3; j++) {
            int v = 100 * i + j;
            temp.add(new IntWritable(v));
            sb.append(v);
            if (j < 2)
                sb.append(",");
            else if (i != 9)
                sb.append("\n");
        }
        list.add(temp);
    }

    String expected = sb.toString();

    Path p = Files.createTempFile("csvwritetest", "csv");
    p.toFile().deleteOnExit();

    FileRecordWriter writer = new CSVRecordWriter();
    FileSplit fileSplit = new FileSplit(p.toFile());
    writer.initialize(fileSplit,new NumberOfRecordsPartitioner());
    for (List<Writable> c : list) {
        writer.write(c);
    }
    writer.close();

    //Read file back in; compare
    String fileContents = FileUtils.readFileToString(p.toFile(), FileRecordWriter.DEFAULT_CHARSET.name());

    //        System.out.println(expected);
    //        System.out.println("----------");
    //        System.out.println(fileContents);

    assertEquals(expected, fileContents);
}
Example #3
Source File: CSVRecordWriterTest.java    From deeplearning4j with Apache License 2.0 5 votes vote down vote up 
@Test
public void testWrite() throws Exception {
    File tempFile = File.createTempFile("datavec", "writer");
    tempFile.deleteOnExit();
    FileSplit fileSplit = new FileSplit(tempFile);
    CSVRecordWriter writer = new CSVRecordWriter();
    writer.initialize(fileSplit,new NumberOfRecordsPartitioner());
    List<Writable> collection = new ArrayList<>();
    collection.add(new Text("12"));
    collection.add(new Text("13"));
    collection.add(new Text("14"));

    writer.write(collection);

    CSVRecordReader reader = new CSVRecordReader(0);
    reader.initialize(new FileSplit(tempFile));
    int cnt = 0;
    while (reader.hasNext()) {
        List<Writable> line = new ArrayList<>(reader.next());
        assertEquals(3, line.size());

        assertEquals(12, line.get(0).toInt());
        assertEquals(13, line.get(1).toInt());
        assertEquals(14, line.get(2).toInt());
        cnt++;
    }
    assertEquals(1, cnt);
}
Example #4
Source File: CSVRecordReaderTest.java    From deeplearning4j with Apache License 2.0 5 votes vote down vote up 
@Test
public void testWrite() throws Exception {
    List<List<Writable>> list = new ArrayList<>();
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < 10; i++) {
        List<Writable> temp = new ArrayList<>();
        for (int j = 0; j < 3; j++) {
            int v = 100 * i + j;
            temp.add(new IntWritable(v));
            sb.append(v);
            if (j < 2)
                sb.append(",");
            else if (i != 9)
                sb.append("\n");
        }
        list.add(temp);
    }

    String expected = sb.toString();

    Path p = Files.createTempFile("csvwritetest", "csv");
    p.toFile().deleteOnExit();

    FileRecordWriter writer = new CSVRecordWriter();
    FileSplit fileSplit = new FileSplit(p.toFile());
    writer.initialize(fileSplit,new NumberOfRecordsPartitioner());
    for (List<Writable> c : list) {
        writer.write(c);
    }
    writer.close();

    //Read file back in; compare
    String fileContents = FileUtils.readFileToString(p.toFile(), FileRecordWriter.DEFAULT_CHARSET.name());

    //        System.out.println(expected);
    //        System.out.println("----------");
    //        System.out.println(fileContents);

    assertEquals(expected, fileContents);
}
Example #5
Source File: LocalExecuteExample.java    From Java-Deep-Learning-Cookbook with MIT License 4 votes vote down vote up 
public static void main(String[] args) throws Exception {
    try {
        int numClasses = 2;
        int batchSize = 8;

        File file = new File("Path/to/titanic.csv-file");
        RecordReader recordReader = new CSVRecordReader(1,',');
        recordReader.initialize(new FileSplit(file));
        // WritableConverter writableConverter = new SelfWritableConverter();

        Schema schema = new Schema.Builder()
                .addColumnInteger("Survived")
                .addColumnCategorical("Pclass", Arrays.asList("1","2","3"))
                .addColumnString("Name")
                .addColumnCategorical("Sex", Arrays.asList("male","female"))
                .addColumnsInteger("Age","Siblings/Spouses Aboard","Parents/Children Aboard")
                .addColumnDouble("Fare")
                .build();
        TransformProcess transformProcess = new TransformProcess.Builder(schema)
                .removeColumns("Name","Fare")
                .categoricalToInteger("Sex")
                .categoricalToOneHot("Pclass")
                .removeColumns("Pclass[1]")
                .build();

        List<List<Writable>> outputData = new ArrayList<>();

        RecordWriter recordWriter = new CSVRecordWriter();
        Partitioner partitioner = new NumberOfRecordsPartitioner();
        recordWriter.initialize(new FileSplit(new File("/Path/To/LocalExecuteExample.csv/file")),partitioner);

        while(recordReader.hasNext()){
            outputData.add(recordReader.next());
        }
        List<List<Writable>> transformedOutput=LocalTransformExecutor.execute(outputData,transformProcess);
        recordWriter.writeBatch(transformedOutput);
        recordWriter.close();
    } catch (IllegalArgumentException e) {
        System.out.println("Please provide proper file paths for titanic.csv & fle in place of: Path/to/titanic.csv-file && /Path/To/LocalExecuteExample.csv");
        System.out.println("You need to create an empty CSV file and mention the file path in place of /Path/To/LocalExecuteExample.csv");
    }
}
Example #6
Source File: LocalExecuteExample.java    From Java-Deep-Learning-Cookbook with MIT License 4 votes vote down vote up 
public static void main(String[] args) throws Exception {
    try {
        int numClasses = 2;
        int batchSize = 8;

        File file = new File("Path/to/titanic.csv-file");
        RecordReader recordReader = new CSVRecordReader(1,',');
        recordReader.initialize(new FileSplit(file));
        // WritableConverter writableConverter = new SelfWritableConverter();

        Schema schema = new Schema.Builder()
                .addColumnInteger("Survived")
                .addColumnCategorical("Pclass", Arrays.asList("1","2","3"))
                .addColumnString("Name")
                .addColumnCategorical("Sex", Arrays.asList("male","female"))
                .addColumnsInteger("Age","Siblings/Spouses Aboard","Parents/Children Aboard")
                .addColumnDouble("Fare")
                .build();
        TransformProcess transformProcess = new TransformProcess.Builder(schema)
                .removeColumns("Name","Fare")
                .categoricalToInteger("Sex")
                .categoricalToOneHot("Pclass")
                .removeColumns("Pclass[1]")
                .build();

        List<List<Writable>> outputData = new ArrayList<>();

        RecordWriter recordWriter = new CSVRecordWriter();
        Partitioner partitioner = new NumberOfRecordsPartitioner();
        recordWriter.initialize(new FileSplit(new File("/Path/To/LocalExecuteExample.csv/file")),partitioner);

        while(recordReader.hasNext()){
            outputData.add(recordReader.next());
        }
        List<List<Writable>> transformedOutput=LocalTransformExecutor.execute(outputData,transformProcess);
        recordWriter.writeBatch(transformedOutput);
        recordWriter.close();
    } catch (IllegalArgumentException e) {
        System.out.println("Please provide proper file paths for titanic.csv & fle in place of: Path/to/titanic.csv-file && /Path/To/LocalExecuteExample.csv");
        System.out.println("You need to create an empty CSV file and mention the file path in place of /Path/To/LocalExecuteExample.csv");
    }
}
Example #7
Source File: CSVOutputFormat.java    From DataVec with Apache License 2.0 4 votes vote down vote up 
@Override
public RecordWriter createWriter(Configuration conf) throws DataVecException {
    String outputPath = conf.get(OutputFormat.OUTPUT_PATH, ".");
    return new CSVRecordWriter();
}
Example #8
Source File: CSVOutputFormat.java    From deeplearning4j with Apache License 2.0 4 votes vote down vote up 
@Override
public RecordWriter createWriter(Configuration conf) throws DataVecException {
    String outputPath = conf.get(OutputFormat.OUTPUT_PATH, ".");
    return new CSVRecordWriter();
}