it.uniroma2.sag.kelp.data.dataset

Class CsvDatasetReader

java.lang.Object

it.uniroma2.sag.kelp.data.dataset.DatasetReader

it.uniroma2.sag.kelp.data.dataset.CsvDatasetReader

public class CsvDatasetReader
extends DatasetReader

A utility class to read dataset in the csv format.

Author:

Simone Filice

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CsvDatasetReader.LabelPosition

Field Summary

Fields inherited from class it.uniroma2.sag.kelp.data.dataset.DatasetReader

inputBuffer, nextRow

Constructor Summary

Constructors

Constructor and Description
CsvDatasetReader(String filename, String representationName, boolean skipFirstLine, CsvDatasetReader.LabelPosition labelPosition) Constructor for reading dataset in csv format.
CsvDatasetReader(String filename, String representationName, boolean skipFirstLine, CsvDatasetReader.LabelPosition labelPosition, StringLabel regressionPropertyName) Constructor for reading dataset in csv format for regression tasks (the regression value is assumed to be in the first column).

Method Summary

Methods

Modifier and Type	Method and Description
Example	readNextExample() Returns the next example

Methods inherited from class it.uniroma2.sag.kelp.data.dataset.DatasetReader

checkRowValidity, close, hasNext, openBufferedReader, restartReading

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CsvDatasetReader

public CsvDatasetReader(String filename,
                String representationName,
                boolean skipFirstLine,
                CsvDatasetReader.LabelPosition labelPosition)
                 throws IOException

Constructor for reading dataset in csv format.

Parameters:

filename - the path of the file to be read

representationName - the name of the vector representation each example consists of

skipFirstLine - if true the first line is skipped (to be used when it contains the header)

labelInFirstColumn - if true the first column is assumed to be a classification label, if false the examples are without label (probably for clustering tasks)

Throws:

IOException

CsvDatasetReader

public CsvDatasetReader(String filename,
                String representationName,
                boolean skipFirstLine,
                CsvDatasetReader.LabelPosition labelPosition,
                StringLabel regressionPropertyName)
                 throws IOException

Constructor for reading dataset in csv format for regression tasks (the regression value is assumed to be in the first column).

Parameters:

filename - the path of the file to be read

representationName - the name of the vector representation each example consists of

skipFirstLine - if true the first line is skipped (to be used when it contains the header)

regressionPropertyName - the name of the regression property to be learned (it is assumed that the first column contains the regression value)

Throws:

IOException

Method Detail

readNextExample

public Example readNextExample()
                        throws IOException,
                               InstantiationException

Description copied from class: DatasetReader

Returns the next example

Overrides:

readNextExample in class DatasetReader

Returns:

the next example

Throws:

IOException

InstantiationException