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Class weka.core.converters.ArffLoader

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

public class ArffLoader
extends AbstractLoader
Reads a source that is in arff text format.

Version:
$Revision: 1.3 $
Author:
Mark Hall (mhall@cs.waikato.ac.nz)
See Also:
Loader

Constructor Index

 o ArffLoader()
 

Method Index

 o getDataSet()
Return the full data set.
 o getNextInstance()
Read the data set incrementally---get the next instance in the data set or returns null if there are no more instances to get.
 o getStructure()
Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.
 o main(String[])
Main method.
 o reset()
Resets the Loader ready to read a new data set
 o setSource(File)
Resets the Loader object and sets the source of the data set to be the supplied File object.
 o setSource(InputStream)
Resets the Loader object and sets the source of the data set to be the supplied InputStream.

Constructor Detail

 o ArffLoader
public ArffLoader()

Method Detail

 o reset
public void reset()
          Resets the Loader ready to read a new data set
 o 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.
Parameters:
file - the source file.
Throws:
java.io.IOException - if an error occurs
Overrides:
setSource in class AbstractLoader
 o setSource
public void setSource(java.io.InputStream in) throws java.io.IOException
          Resets the Loader object and sets the source of the data set to be the supplied InputStream.
Parameters:
in - the source InputStream.
Throws:
java.io.IOException - always thrown.
Overrides:
setSource in class AbstractLoader
 o 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.
Returns:
the structure of the data set as an empty set of Instances
Throws:
java.io.IOException - if an error occurs
Overrides:
getStructure in class AbstractLoader
 o 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.
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
Overrides:
getDataSet in class AbstractLoader
 o getNextInstance
public Instance getNextInstance() throws java.io.IOException
          Read the data set incrementally---get the next instance in the data set or returns null if there are no more instances to get. If the structure hasn't yet been determined by a call to getStructure then method should do so before returning the next instance in the data set.
Returns:
the next instance in the data set as an Instance object or null if there are no more instances to be read
Throws:
java.io.IOException - if there is an error during parsing
Overrides:
getNextInstance in class AbstractLoader
 o main
public static void main(java.lang.String args[])
          Main method.
Parameters:
args - should contain the name of an input file.

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