converterutils.datasource.html

来自「数据挖掘的最常用工具。由于开源」· HTML 代码 · 共 729 行 · 第 1/2 页

<DD>Initializes the datasource with the given input stream. This stream
 is always interpreted as ARFF.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>stream</CODE> - the stream to use</DL>
</DL>

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<B>Method Detail</B></FONT></TH>
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<A NAME="isArff(java.lang.String)"><!-- --></A><H3>
isArff</H3>
<PRE>
public static boolean <B>isArff</B>(java.lang.String&nbsp;location)</PRE>
<DL>
<DD>returns whether the extension of the location is likely to be of ARFF
 format, i.e., ending in ".arff" or ".arff.gz" (case-insensitive).
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>location</CODE> - the file location to check
<DT><B>Returns:</B><DD>true if the location seems to be of ARFF format</DL>
</DD>
</DL>
<HR>

<A NAME="isIncremental()"><!-- --></A><H3>
isIncremental</H3>
<PRE>
public boolean <B>isIncremental</B>()</PRE>
<DL>
<DD>returns whether the loader is an incremental one.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if the loader is a true incremental one</DL>
</DD>
</DL>
<HR>

<A NAME="getLoader()"><!-- --></A><H3>
getLoader</H3>
<PRE>
public <A HREF="../../../weka/core/converters/Loader.html" title="interface in weka.core.converters">Loader</A> <B>getLoader</B>()</PRE>
<DL>
<DD>returns the determined loader, null if the DataSource was initialized
 with data alone and not a file/URL.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the loader used for retrieving the data</DL>
</DD>
</DL>
<HR>

<A NAME="getDataSet()"><!-- --></A><H3>
getDataSet</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getDataSet</B>()
                     throws java.lang.Exception</PRE>
<DL>
<DD>returns the full dataset, can be null in case of an error.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the full dataset
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if resetting of loader fails</DL>
</DD>
</DL>
<HR>

<A NAME="getDataSet(int)"><!-- --></A><H3>
getDataSet</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getDataSet</B>(int&nbsp;classIndex)
                     throws java.lang.Exception</PRE>
<DL>
<DD>returns the full dataset with the specified class index set, 
 can be null in case of an error.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>classIndex</CODE> - the class index for the dataset
<DT><B>Returns:</B><DD>the full dataset
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if resetting of loader fails</DL>
</DD>
</DL>
<HR>

<A NAME="reset()"><!-- --></A><H3>
reset</H3>
<PRE>
public void <B>reset</B>()
           throws java.lang.Exception</PRE>
<DL>
<DD>resets the loader.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if resetting fails</DL>
</DD>
</DL>
<HR>

<A NAME="getStructure()"><!-- --></A><H3>
getStructure</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getStructure</B>()
                       throws java.lang.Exception</PRE>
<DL>
<DD>returns the structure of the data.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the structure of the data
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong</DL>
</DD>
</DL>
<HR>

<A NAME="getStructure(int)"><!-- --></A><H3>
getStructure</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getStructure</B>(int&nbsp;classIndex)
                       throws java.lang.Exception</PRE>
<DL>
<DD>returns the structure of the data, with the defined class index.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>classIndex</CODE> - the class index for the dataset
<DT><B>Returns:</B><DD>the structure of the data
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong</DL>
</DD>
</DL>
<HR>

<A NAME="hasMoreElements(weka.core.Instances)"><!-- --></A><H3>
hasMoreElements</H3>
<PRE>
public boolean <B>hasMoreElements</B>(<A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;structure)</PRE>
<DL>
<DD>returns whether there are more Instance objects in the data.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>structure</CODE> - the structure of the dataset
<DT><B>Returns:</B><DD>true if there are more Instance objects 
                        available<DT><B>See Also:</B><DD><A HREF="../../../weka/core/converters/ConverterUtils.DataSource.html#nextElement(weka.core.Instances)"><CODE>nextElement(Instances)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="nextElement(weka.core.Instances)"><!-- --></A><H3>
nextElement</H3>
<PRE>
public <A HREF="../../../weka/core/Instance.html" title="class in weka.core">Instance</A> <B>nextElement</B>(<A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;dataset)</PRE>
<DL>
<DD>returns the next element and sets the specified dataset, null if 
 none available.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>dataset</CODE> - the dataset to set for the instance
<DT><B>Returns:</B><DD>the next Instance</DL>
</DD>
</DL>
<HR>

<A NAME="read(java.lang.String)"><!-- --></A><H3>
read</H3>
<PRE>
public static <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>read</B>(java.lang.String&nbsp;location)
                      throws java.lang.Exception</PRE>
<DL>
<DD>convencience method for loading a dataset in batch mode.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>location</CODE> - the dataset to load
<DT><B>Returns:</B><DD>the dataset
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if loading fails<DT><B>See Also:</B><DD><CODE>#DataSource(String)</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="read(java.io.InputStream)"><!-- --></A><H3>
read</H3>
<PRE>
public static <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>read</B>(java.io.InputStream&nbsp;stream)
                      throws java.lang.Exception</PRE>
<DL>
<DD>convencience method for loading a dataset in batch mode from a stream.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>stream</CODE> - the stream to load the dataset from
<DT><B>Returns:</B><DD>the dataset
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if loading fails<DT><B>See Also:</B><DD><CODE>#DataSource(InputStream)</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="read(weka.core.converters.Loader)"><!-- --></A><H3>
read</H3>
<PRE>
public static <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>read</B>(<A HREF="../../../weka/core/converters/Loader.html" title="interface in weka.core.converters">Loader</A>&nbsp;loader)
                      throws java.lang.Exception</PRE>
<DL>
<DD>convencience method for loading a dataset in batch mode.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>loader</CODE> - the loader to get the dataset from
<DT><B>Returns:</B><DD>the dataset
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if loading fails<DT><B>See Also:</B><DD><CODE>#DataSource(Loader)</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="main(java.lang.String[])"><!-- --></A><H3>
main</H3>
<PRE>
public static void <B>main</B>(java.lang.String[]&nbsp;args)
                 throws java.lang.Exception</PRE>
<DL>
<DD>for testing only - takes a data file as input.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>args</CODE> - the commandline arguments
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong</DL>
</DD>
</DL>
<HR>

<A NAME="getRevision()"><!-- --></A><H3>
getRevision</H3>
<PRE>
public java.lang.String <B>getRevision</B>()</PRE>
<DL>
<DD>Returns the revision string.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/RevisionHandler.html#getRevision()">getRevision</A></CODE> in interface <CODE><A HREF="../../../weka/core/RevisionHandler.html" title="interface in weka.core">RevisionHandler</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the revision</DL>
</DD>
</DL>
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