snowballstemmer.html

weka是机器学习和数据挖掘领域最有影响力的开源项目之一

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<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#weka.core.stemmers.SnowballStemmer.PACKAGE_EXT">Constant Field Values</A></DL>
</DL>

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<B>Constructor Detail</B></FONT></TH>
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<A NAME="SnowballStemmer()"><!-- --></A><H3>
SnowballStemmer</H3>
<PRE>
public <B>SnowballStemmer</B>()</PRE>
<DL>
<DD>initializes the stemmer ("porter")
<P>
</DL>
<HR>

<A NAME="SnowballStemmer(java.lang.String)"><!-- --></A><H3>
SnowballStemmer</H3>
<PRE>
public <B>SnowballStemmer</B>(java.lang.String&nbsp;name)</PRE>
<DL>
<DD>initializes the stemmer with the given stemmer
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of the stemmer</DL>
</DL>

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<A NAME="globalInfo()"><!-- --></A><H3>
globalInfo</H3>
<PRE>
public java.lang.String <B>globalInfo</B>()</PRE>
<DL>
<DD>Returns a string describing the stemmer
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a description suitable for
         displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="listOptions()"><!-- --></A><H3>
listOptions</H3>
<PRE>
public java.util.Enumeration <B>listOptions</B>()</PRE>
<DL>
<DD>Returns an enumeration describing the available options.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/OptionHandler.html#listOptions()">listOptions</A></CODE> in interface <CODE><A HREF="../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an enumeration of all the available options.</DL>
</DD>
</DL>
<HR>

<A NAME="setOptions(java.lang.String[])"><!-- --></A><H3>
setOptions</H3>
<PRE>
public void <B>setOptions</B>(java.lang.String[]&nbsp;options)
                throws java.lang.Exception</PRE>
<DL>
<DD>Parses the options. <p/>

   <!-- options-start -->
 Valid options are: <p/>
 
 <pre> -S &lt;name&gt;
  The name of the snowball stemmer (default 'porter').
  available stemmers:
     danish, dutch, english, finnish, french, german, italian, 
     norwegian, porter, portuguese, russian, spanish, swedish
 </pre>
 
   <!-- options-end -->
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/OptionHandler.html#setOptions(java.lang.String[])">setOptions</A></CODE> in interface <CODE><A HREF="../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>options</CODE> - the options to parse
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if parsing fails</DL>
</DD>
</DL>
<HR>

<A NAME="getOptions()"><!-- --></A><H3>
getOptions</H3>
<PRE>
public java.lang.String[] <B>getOptions</B>()</PRE>
<DL>
<DD>Gets the current settings of the classifier.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/OptionHandler.html#getOptions()">getOptions</A></CODE> in interface <CODE><A HREF="../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an array of strings suitable for passing to setOptions</DL>
</DD>
</DL>
<HR>

<A NAME="isPresent()"><!-- --></A><H3>
isPresent</H3>
<PRE>
public static boolean <B>isPresent</B>()</PRE>
<DL>
<DD>returns whether Snowball is present or not, i.e. whether the classes are
 in the classpath or not
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>whether Snowball is available</DL>
</DD>
</DL>
<HR>

<A NAME="listStemmers()"><!-- --></A><H3>
listStemmers</H3>
<PRE>
public static java.util.Enumeration <B>listStemmers</B>()</PRE>
<DL>
<DD>returns an enumeration over all currently stored stemmer names
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>all available stemmers</DL>
</DD>
</DL>
<HR>

<A NAME="getStemmer()"><!-- --></A><H3>
getStemmer</H3>
<PRE>
public java.lang.String <B>getStemmer</B>()</PRE>
<DL>
<DD>returns the name of the current stemmer, null if none is set
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the name of the stemmer</DL>
</DD>
</DL>
<HR>

<A NAME="setStemmer(java.lang.String)"><!-- --></A><H3>
setStemmer</H3>
<PRE>
public void <B>setStemmer</B>(java.lang.String&nbsp;name)</PRE>
<DL>
<DD>sets the stemmer with the given name, e.g., "porter"
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of the stemmer, e.g., "porter"</DL>
</DD>
</DL>
<HR>

<A NAME="stemmerTipText()"><!-- --></A><H3>
stemmerTipText</H3>
<PRE>
public java.lang.String <B>stemmerTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>tip text for this property suitable for
 displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="stem(java.lang.String)"><!-- --></A><H3>
stem</H3>
<PRE>
public java.lang.String <B>stem</B>(java.lang.String&nbsp;word)</PRE>
<DL>
<DD>Returns the word in its stemmed form.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/stemmers/Stemmer.html#stem(java.lang.String)">stem</A></CODE> in interface <CODE><A HREF="../../../weka/core/stemmers/Stemmer.html" title="interface in weka.core.stemmers">Stemmer</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>word</CODE> - the unstemmed word
<DT><B>Returns:</B><DD>the stemmed word</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>returns a string representation of the stemmer
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>toString</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a string representation of the stemmer</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)</PRE>
<DL>
<DD>Runs the stemmer with the given options
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>args</CODE> - the options</DL>
</DD>
</DL>
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