weka.core.converters
Class CSVLoader

java.lang.Object
  |
  +--weka.core.converters.AbstractLoader
        |
        +--weka.core.converters.CSVLoader

All Implemented Interfaces:

Loader, java.io.Serializable

public class CSVLoader

extends AbstractLoader

Reads a text file that is comma or tab delimited..

Author:

Mark Hall (mhall@cs.waikato.ac.nz)

See Also:

Loader, Serialized Form

Field Summary

protected java.io.File	m_sourceFile Holds the source of the data set.
protected Instances	m_structure Holds the determined structure (header) of the data set.

Fields inherited from class weka.core.converters.AbstractLoader

BATCH, INCREMENTAL, m_Retrieval, NONE

Constructor Summary

CSVLoader()

Method Summary

Instances	getDataSet() Return the full data set.
Instance	getNextInstance() CSVLoader is unable to process a data set incrementally.
Instances	getStructure() Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.
java.lang.String	globalInfo() Returns a string describing this attribute evaluator
static void	main(java.lang.String[] args) Main method.
void	reset() Resets the loader ready to read a new data set
void	setSource(java.io.File file) Resets the Loader object and sets the source of the data set to be the supplied File object.

Methods inherited from class weka.core.converters.AbstractLoader

getRetrieval, setRetrieval, setSource

Methods inherited from class java.lang.Object

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

Field Detail

m_structure

protected Instances m_structure

Holds the determined structure (header) of the data set.

m_sourceFile

protected java.io.File m_sourceFile

Holds the source of the data set.

Constructor Detail

CSVLoader

public CSVLoader()

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this attribute evaluator

Returns:

a description of the evaluator suitable for displaying in the explorer/experimenter gui

reset

public void reset()

Resets the loader ready to read a new data set

setSource

public void setSource(java.io.File file)
               throws java.io.IOException

Resets the Loader object and sets the source of the data set to be the supplied File object.

Overrides:

setSource in class AbstractLoader

Parameters:

file - the source file.

Throws:

java.io.IOException - if an error occurs

getStructure

public Instances getStructure()
                       throws java.io.IOException

Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.

Overrides:

getStructure in class AbstractLoader

Returns:

the structure of the data set as an empty set of Instances

Throws:

java.io.IOException - if an error occurs

getDataSet

public Instances getDataSet()
                     throws java.io.IOException

Return the full data set. If the structure hasn't yet been determined by a call to getStructure then method should do so before processing the rest of the data set.

Overrides:

getDataSet in class AbstractLoader

Returns:

the structure of the data set as an empty set of Instances

Throws:

java.io.IOException - if there is no source or parsing fails

getNextInstance

public Instance getNextInstance()
                         throws java.io.IOException

CSVLoader is unable to process a data set incrementally.

Overrides:

getNextInstance in class AbstractLoader

Returns:

never returns without throwing an exception

Throws:

java.io.IOException - always. CSVLoader is unable to process a data set incrementally.

main

public static void main(java.lang.String[] args)

Main method.

Parameters:

args - should contain the name of an input file.