smile.data.parser

Class LibsvmParser

java.lang.Object

smile.data.parser.LibsvmParser

public class LibsvmParser
extends Object

LIBSVM (and SVMLight) data parser. The format of libsvm file is:

<label> <index1>:<value1> <index2>:<value2> ...

where <label> is the target value of the training data. For classification, it should be an integer which identifies a class (multi-class classification is supported). For regression, it's any real number. For one-class SVM, it's not used so can be any number. <index> is an integer starting from 1, and <value> is a real number. The indices must be in an ascending order. The labels in the testing data file are only used to calculate accuracy or error. If they are unknown, just fill this column with a number.

Author:

Haifeng Li

Constructor Summary

Constructors

Constructor and Description
LibsvmParser() Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
SparseDataset	parse(File file) Parse a libsvm sparse dataset from given file.
SparseDataset	parse(String path) Parse a libsvm sparse dataset from given file.
SparseDataset	parse(String name, File file) Parse a libsvm sparse dataset from given file.
SparseDataset	parse(String name, InputStream stream) Parse a libsvm sparse dataset from an input stream.
SparseDataset	parse(String name, String path) Parse a libsvm sparse dataset from given file.
SparseDataset	parse(String name, URI uri) Parse a libsvm sparse dataset from given URI.
SparseDataset	parse(URI uri) Parse a libsvm sparse dataset from given URI.

Methods inherited from class java.lang.Object

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

Constructor Detail

LibsvmParser

public LibsvmParser()

Constructor.

Method Detail

parse

public SparseDataset parse(URI uri)
                    throws FileNotFoundException,
                           IOException,
                           ParseException

Parse a libsvm sparse dataset from given URI.

Throws:

FileNotFoundException

IOException

ParseException

parse

public SparseDataset parse(String name,
                  URI uri)
                    throws FileNotFoundException,
                           IOException,
                           ParseException

Parse a libsvm sparse dataset from given URI.

Parameters:

uri - the URI of data source.

Throws:

FileNotFoundException

IOException

ParseException

parse

public SparseDataset parse(String path)
                    throws FileNotFoundException,
                           IOException,
                           ParseException

Parse a libsvm sparse dataset from given file.

Throws:

FileNotFoundException

IOException

ParseException

parse

public SparseDataset parse(String name,
                  String path)
                    throws FileNotFoundException,
                           IOException,
                           ParseException

Parse a libsvm sparse dataset from given file.

Parameters:

path - the file path of data source.

Throws:

FileNotFoundException

IOException

ParseException

parse

public SparseDataset parse(File file)
                    throws FileNotFoundException,
                           IOException,
                           ParseException

Parse a libsvm sparse dataset from given file.

Throws:

FileNotFoundException

IOException

ParseException

parse

public SparseDataset parse(String name,
                  File file)
                    throws FileNotFoundException,
                           IOException,
                           ParseException

Parse a libsvm sparse dataset from given file.

Parameters:

file - the file of data source.

Throws:

FileNotFoundException

IOException

ParseException

parse

public SparseDataset parse(String name,
                  InputStream stream)
                    throws IOException,
                           ParseException

Parse a libsvm sparse dataset from an input stream.

Parameters:

name - the name of dataset.

stream - the input stream of data.

Throws:

FileNotFoundException

IOException

ParseException