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java.lang.Objectweka.core.converters.AbstractLoader
weka.core.converters.AbstractFileLoader
weka.core.converters.ArffLoader
public class ArffLoader
Reads a source that is in arff (attribute relation file format) format.
Loader,
Serialized Form| Nested Class Summary | |
|---|---|
static class |
ArffLoader.ArffReader
Reads data from an ARFF file, either in incremental or batch mode. |
| Field Summary | |
|---|---|
static java.lang.String |
FILE_EXTENSION
the file extension |
static java.lang.String |
FILE_EXTENSION_COMPRESSED
|
| Constructor Summary | |
|---|---|
ArffLoader()
|
|
| Method Summary | |
|---|---|
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 arff files |
java.lang.String[] |
getFileExtensions()
Gets all the file extensions used for this type of file |
Instance |
getNextInstance(Instances structure)
Read the data set incrementally---get the next instance in the data set or returns null if there are no more instances to get. |
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 or the same data set again. |
java.io.File |
retrieveFile()
get the File specified as the source |
java.lang.String |
retrieveURL()
Return the current url |
void |
setFile(java.io.File file)
sets the source File |
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, runFileLoader, setEnvironment, setSource, setUseRelativePath, useRelativePathTipText |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public static java.lang.String FILE_EXTENSION
public static java.lang.String FILE_EXTENSION_COMPRESSED
| Constructor Detail |
|---|
public ArffLoader()
| Method Detail |
|---|
public java.lang.String globalInfo()
public java.lang.String getFileExtension()
getFileExtension in interface FileSourcedConverterpublic java.lang.String[] getFileExtensions()
getFileExtensions in interface FileSourcedConverterpublic java.lang.String getFileDescription()
getFileDescription in interface FileSourcedConverter
public void reset()
throws java.io.IOException
reset in interface Loaderreset in class AbstractFileLoaderjava.io.IOException - if something goes wrong
public void setSource(java.net.URL url)
throws java.io.IOException
url - the source url.
java.io.IOException - if an error occurspublic java.io.File retrieveFile()
retrieveFile in interface FileSourcedConverterretrieveFile in class AbstractFileLoader
public void setFile(java.io.File file)
throws java.io.IOException
setFile in interface FileSourcedConvertersetFile in class AbstractFileLoaderfile - the source file
java.io.IOException - if an error occurs
public void setURL(java.lang.String url)
throws java.io.IOException
setURL in interface URLSourcedLoaderurl - the url to load from
java.io.IOException - if the url can't be set.public java.lang.String retrieveURL()
retrieveURL in interface URLSourcedLoader
public void setSource(java.io.InputStream in)
throws java.io.IOException
setSource in interface LoadersetSource in class AbstractLoaderin - the source InputStream.
java.io.IOException - always thrown.
public Instances getStructure()
throws java.io.IOException
getStructure in interface LoadergetStructure in class AbstractLoaderjava.io.IOException - if an error occurs
public Instances getDataSet()
throws java.io.IOException
getDataSet in interface LoadergetDataSet in class AbstractLoaderjava.io.IOException - if there is no source or parsing fails
public Instance getNextInstance(Instances structure)
throws java.io.IOException
getNextInstance in interface LoadergetNextInstance in class AbstractLoaderstructure - the dataset header information, will get updated in
case of string or relational attributes
java.io.IOException - if there is an error during parsingpublic java.lang.String getRevision()
getRevision in interface RevisionHandlerpublic static void main(java.lang.String[] args)
args - should contain the name of an input file.
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