Package weka.core.converters
Class LibSVMLoader
- java.lang.Object
-
- weka.core.converters.AbstractLoader
-
- weka.core.converters.AbstractFileLoader
-
- weka.core.converters.LibSVMLoader
-
- All Implemented Interfaces:
java.io.Serializable
,BatchConverter
,FileSourcedConverter
,Loader
,URLSourcedLoader
,EnvironmentHandler
,RevisionHandler
public class LibSVMLoader extends AbstractFileLoader implements BatchConverter, URLSourcedLoader
Reads a source that is in libsvm format.
For more information about libsvm see:
http://www.csie.ntu.edu.tw/~cjlin/libsvm/- Version:
- $Revision: 11362 $
- Author:
- FracPete (fracpete at waikato dot ac dot nz)
- See Also:
Loader
, Serialized Form
-
-
Field Summary
Fields Modifier and Type Field Description static java.lang.String
FILE_EXTENSION
the file extension.-
Fields inherited from class weka.core.converters.AbstractFileLoader
FILE_EXTENSION_COMPRESSED
-
Fields inherited from interface weka.core.converters.Loader
BATCH, INCREMENTAL, NONE
-
-
Constructor Summary
Constructors Constructor Description LibSVMLoader()
-
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Instances
getDataSet()
Return the full data set.java.lang.String
getFileDescription()
Returns a description of the file type.java.lang.String
getFileExtension()
Get the file extension used for libsvm files.java.lang.String[]
getFileExtensions()
Gets all the file extensions used for this type of file.Instance
getNextInstance(Instances structure)
LibSVmLoader is unable to process a data set incrementally.java.lang.String
getRevision()
Returns the revision string.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 Loader.static void
main(java.lang.String[] args)
Main method.void
reset()
Resets the Loader ready to read a new data set.java.lang.String
retrieveURL()
Return the current url.void
setSource(java.io.InputStream in)
Resets the Loader object and sets the source of the data set to be the supplied InputStream.void
setSource(java.net.URL url)
Resets the Loader object and sets the source of the data set to be the supplied url.void
setURL(java.lang.String url)
Set the url to load from.-
Methods inherited from class weka.core.converters.AbstractFileLoader
getUseRelativePath, retrieveFile, runFileLoader, setEnvironment, setFile, setSource, setUseRelativePath, useRelativePathTipText
-
Methods inherited from class weka.core.converters.AbstractLoader
setRetrieval
-
-
-
-
Method Detail
-
globalInfo
public java.lang.String globalInfo()
Returns a string describing this Loader.- Returns:
- a description of the Loader suitable for displaying in the explorer/experimenter gui
-
getFileExtension
public java.lang.String getFileExtension()
Get the file extension used for libsvm files.- Specified by:
getFileExtension
in interfaceFileSourcedConverter
- Returns:
- the file extension
-
getFileExtensions
public java.lang.String[] getFileExtensions()
Gets all the file extensions used for this type of file.- Specified by:
getFileExtensions
in interfaceFileSourcedConverter
- Returns:
- the file extensions
-
getFileDescription
public java.lang.String getFileDescription()
Returns a description of the file type.- Specified by:
getFileDescription
in interfaceFileSourcedConverter
- Returns:
- a short file description
-
reset
public void reset() throws java.io.IOException
Resets the Loader ready to read a new data set.- Specified by:
reset
in interfaceLoader
- Overrides:
reset
in classAbstractFileLoader
- Throws:
java.io.IOException
- if something goes wrong
-
setSource
public void setSource(java.net.URL url) throws java.io.IOException
Resets the Loader object and sets the source of the data set to be the supplied url.- Parameters:
url
- the source url.- Throws:
java.io.IOException
- if an error occurs
-
setURL
public void setURL(java.lang.String url) throws java.io.IOException
Set the url to load from.- Specified by:
setURL
in interfaceURLSourcedLoader
- Parameters:
url
- the url to load from- Throws:
java.io.IOException
- if the url can't be set.
-
retrieveURL
public java.lang.String retrieveURL()
Return the current url.- Specified by:
retrieveURL
in interfaceURLSourcedLoader
- Returns:
- the current url
-
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.- Specified by:
setSource
in interfaceLoader
- Overrides:
setSource
in classAbstractLoader
- Parameters:
in
- the source InputStream.- Throws:
java.io.IOException
- if initialization of reader fails.
-
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.- Specified by:
getStructure
in interfaceLoader
- Specified by:
getStructure
in classAbstractLoader
- 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.- Specified by:
getDataSet
in interfaceLoader
- Specified by:
getDataSet
in classAbstractLoader
- 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(Instances structure) throws java.io.IOException
LibSVmLoader is unable to process a data set incrementally.- Specified by:
getNextInstance
in interfaceLoader
- Specified by:
getNextInstance
in classAbstractLoader
- Parameters:
structure
- ignored- Returns:
- never returns without throwing an exception
- Throws:
java.io.IOException
- always. LibSVMLoader is unable to process a data set incrementally.
-
getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Returns:
- the revision
-
main
public static void main(java.lang.String[] args)
Main method.- Parameters:
args
- should contain the name of an input file.
-
-