LibSVMLoader (original) (raw)

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:11362Revision: 11362 Revision:11362
Author:
FracPete (fracpete at waikato dot ac dot nz)
See Also:
Loader, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	FILE_EXTENSION the file extension.

   * ### Fields inherited from class weka.core.converters.[AbstractFileLoader](../../../weka/core/converters/AbstractFileLoader.html "class in weka.core.converters")  
   `[FILE_EXTENSION_COMPRESSED](../../../weka/core/converters/AbstractFileLoader.html#FILE%5FEXTENSION%5FCOMPRESSED)`  
   * ### Fields inherited from interface weka.core.converters.[Loader](../../../weka/core/converters/Loader.html "interface in weka.core.converters")  
   `[BATCH](../../../weka/core/converters/Loader.html#BATCH), [INCREMENTAL](../../../weka/core/converters/Loader.html#INCREMENTAL), [NONE](../../../weka/core/converters/Loader.html#NONE)`

Constructor Summary

Constructors

Constructor and Description
LibSVMLoader()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods

Modifier and Type	Method and 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](../../../weka/core/converters/AbstractFileLoader.html "class in weka.core.converters")  
   `[getUseRelativePath](../../../weka/core/converters/AbstractFileLoader.html#getUseRelativePath--), [retrieveFile](../../../weka/core/converters/AbstractFileLoader.html#retrieveFile--), [runFileLoader](../../../weka/core/converters/AbstractFileLoader.html#runFileLoader-weka.core.converters.AbstractFileLoader-java.lang.String:A-), [setEnvironment](../../../weka/core/converters/AbstractFileLoader.html#setEnvironment-weka.core.Environment-), [setFile](../../../weka/core/converters/AbstractFileLoader.html#setFile-java.io.File-), [setSource](../../../weka/core/converters/AbstractFileLoader.html#setSource-java.io.File-), [setUseRelativePath](../../../weka/core/converters/AbstractFileLoader.html#setUseRelativePath-boolean-), [useRelativePathTipText](../../../weka/core/converters/AbstractFileLoader.html#useRelativePathTipText--)`  
   * ### Methods inherited from class weka.core.converters.[AbstractLoader](../../../weka/core/converters/AbstractLoader.html "class in weka.core.converters")  
   `[setRetrieval](../../../weka/core/converters/AbstractLoader.html#setRetrieval-int-)`  
   * ### Methods inherited from class java.lang.Object  
   `equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

 * #### FILE\_EXTENSION  
 public static java.lang.String FILE_EXTENSION  
 the file extension.

Constructor Detail

* #### LibSVMLoader  
public LibSVMLoader()

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](../../../weka/core/converters/FileSourcedConverter.html#getFileExtension--)` in interface `[FileSourcedConverter](../../../weka/core/converters/FileSourcedConverter.html "interface in weka.core.converters")`  
Returns:  
the file extension  
* #### getFileExtensions  
public java.lang.String[] getFileExtensions()  
Gets all the file extensions used for this type of file.  
Specified by:  
`[getFileExtensions](../../../weka/core/converters/FileSourcedConverter.html#getFileExtensions--)` in interface `[FileSourcedConverter](../../../weka/core/converters/FileSourcedConverter.html "interface in weka.core.converters")`  
Returns:  
the file extensions  
* #### getFileDescription  
public java.lang.String getFileDescription()  
Returns a description of the file type.  
Specified by:  
`[getFileDescription](../../../weka/core/converters/FileSourcedConverter.html#getFileDescription--)` in interface `[FileSourcedConverter](../../../weka/core/converters/FileSourcedConverter.html "interface in weka.core.converters")`  
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](../../../weka/core/converters/Loader.html#reset--)` in interface `[Loader](../../../weka/core/converters/Loader.html "interface in weka.core.converters")`  
Overrides:  
`[reset](../../../weka/core/converters/AbstractFileLoader.html#reset--)` in class `[AbstractFileLoader](../../../weka/core/converters/AbstractFileLoader.html "class in weka.core.converters")`  
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](../../../weka/core/converters/URLSourcedLoader.html#setURL-java.lang.String-)` in interface `[URLSourcedLoader](../../../weka/core/converters/URLSourcedLoader.html "interface in weka.core.converters")`  
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](../../../weka/core/converters/URLSourcedLoader.html#retrieveURL--)` in interface `[URLSourcedLoader](../../../weka/core/converters/URLSourcedLoader.html "interface in weka.core.converters")`  
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](../../../weka/core/converters/Loader.html#setSource-java.io.InputStream-)` in interface `[Loader](../../../weka/core/converters/Loader.html "interface in weka.core.converters")`  
Overrides:  
`[setSource](../../../weka/core/converters/AbstractLoader.html#setSource-java.io.InputStream-)` in class `[AbstractLoader](../../../weka/core/converters/AbstractLoader.html "class in weka.core.converters")`  
Parameters:  
`in` \- the source InputStream.  
Throws:  
`java.io.IOException` \- if initialization of reader fails.  
* #### getStructure  
public [Instances](../../../weka/core/Instances.html "class in weka.core") 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](../../../weka/core/converters/Loader.html#getStructure--)` in interface `[Loader](../../../weka/core/converters/Loader.html "interface in weka.core.converters")`  
Specified by:  
`[getStructure](../../../weka/core/converters/AbstractLoader.html#getStructure--)` in class `[AbstractLoader](../../../weka/core/converters/AbstractLoader.html "class in weka.core.converters")`  
Returns:  
the structure of the data set as an empty set of Instances  
Throws:  
`java.io.IOException` \- if an error occurs  
* #### getDataSet  
public [Instances](../../../weka/core/Instances.html "class in weka.core") 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](../../../weka/core/converters/Loader.html#getDataSet--)` in interface `[Loader](../../../weka/core/converters/Loader.html "interface in weka.core.converters")`  
Specified by:  
`[getDataSet](../../../weka/core/converters/AbstractLoader.html#getDataSet--)` in class `[AbstractLoader](../../../weka/core/converters/AbstractLoader.html "class in weka.core.converters")`  
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](../../../weka/core/Instance.html "class in weka.core") getNextInstance([Instances](../../../weka/core/Instances.html "class in weka.core") structure)  
                         throws java.io.IOException  
LibSVmLoader is unable to process a data set incrementally.  
Specified by:  
`[getNextInstance](../../../weka/core/converters/Loader.html#getNextInstance-weka.core.Instances-)` in interface `[Loader](../../../weka/core/converters/Loader.html "interface in weka.core.converters")`  
Specified by:  
`[getNextInstance](../../../weka/core/converters/AbstractLoader.html#getNextInstance-weka.core.Instances-)` in class `[AbstractLoader](../../../weka/core/converters/AbstractLoader.html "class in weka.core.converters")`  
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](../../../weka/core/RevisionHandler.html#getRevision--)` in interface `[RevisionHandler](../../../weka/core/RevisionHandler.html "interface in weka.core")`  
Returns:  
the revision  
* #### main  
public static void main(java.lang.String[] args)  
Main method.  
Parameters:  
`args` \- should contain the name of an input file.

LibSVMLoader (original) (raw)

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail