📄 entropydiscretizer.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0-beta2) on Tue Jun 22 21:55:06 EDT 2004 --><TITLE>EntropyDiscretizer (jBNC - Bayesian Network Classifiers Toolbox API)</TITLE><META NAME="keywords" CONTENT="jbnc.discretize.EntropyDiscretizer class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="EntropyDiscretizer (jBNC - Bayesian Network Classifiers Toolbox API)";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>jBNC Toolbox</EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../jbnc/discretize/Case.html" title="class in jbnc.discretize"><B>PREV CLASS</B></A> NEXT CLASS</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html?jbnc/discretize/EntropyDiscretizer.html" target="_top"><B>FRAMES</B></A> <A HREF="EntropyDiscretizer.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">jbnc.discretize</FONT><BR>Class EntropyDiscretizer</H2><PRE>java.lang.Object <IMG SRC="../../resources/inherit.gif" ALT="extended by "><B>jbnc.discretize.EntropyDiscretizer</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.io.Serializable</DD></DL><HR><DL><DT><PRE>public final class <B>EntropyDiscretizer</B><DT>extends java.lang.Object<DT>implements java.io.Serializable</DL></PRE><P>Implements entropy based discretisation algotithm by Fayyad and Irani.<p> <p/> U.M. Fayyad and K.B Irani "Multi-interval discretizationn of contnous-valued attributes for classification learning", In <i>Proc. Thirtheenth International Joint Conference on Artificial Intelligence</i>, Chambery, France. Morgan Kauffman, pp. 1022-1027, 1993. <p> <p/> Discretization process maps a continuous value into a fixed set of partitions. Partitioning is uniquely described by a set of partition boundaries. A first partition corresponds to interval from negative infinity to first partition point (inclusively). Second partition streaches from first boundary point (exclusively) to second boundary point (inclusively). And so on. Last partition streaches from last boundary point (exclusively) to positive infinity.<p> <p/> This disretization algorithm is intended for discetization of attributes as a preprocessing step for a classification. It requires knowledge of a class for each case (nstance) used to build discretizer. A discretizer is build for each attribute separately.<p> <p/> To create a discretizer use method <code>buildDiscretizer()</code>. To applay the discretizer use method <code>discretize()</code>.<P><P><DL><DT><B>See Also:</B><DD><A HREF="../../serialized-form.html#jbnc.discretize.EntropyDiscretizer">Serialized Form</A></DL><HR><P><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../jbnc/discretize/EntropyDiscretizer.html#EntropyDiscretizer()">EntropyDiscretizer</A></B>()</CODE><BR> </TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../jbnc/discretize/EntropyDiscretizer.html#buildDiscretizer(jbnc.discretize.Case[])">buildDiscretizer</A></B>(<A HREF="../../jbnc/discretize/Case.html" title="class in jbnc.discretize">Case</A>[] cases)</CODE><BR> Performs construction of the discretizer for a set of cases (class + continous attribute pairs).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../jbnc/discretize/EntropyDiscretizer.html#discretize(double)">discretize</A></B>(double v)</CODE><BR> Discretize single continous value.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> double[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../jbnc/discretize/EntropyDiscretizer.html#getPartitionBoundaries()">getPartitionBoundaries</A></B>()</CODE><BR> Return array representing partition boundaries.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.String[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../jbnc/discretize/EntropyDiscretizer.html#getPartitionNames()">getPartitionNames</A></B>()</CODE><BR> Return symbolic names describing discretization partitions.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TH></TR></TABLE><A NAME="EntropyDiscretizer()"><!-- --></A><H3>EntropyDiscretizer</H3><PRE>public <B>EntropyDiscretizer</B>()</PRE><DL></DL><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"><B>Method Detail</B></FONT></TH></TR></TABLE><A NAME="buildDiscretizer(jbnc.discretize.Case[])"><!-- --></A><H3>buildDiscretizer</H3><PRE>public void <B>buildDiscretizer</B>(<A HREF="../../jbnc/discretize/Case.html" title="class in jbnc.discretize">Case</A>[] cases)</PRE><DL><DD>Performs construction of the discretizer for a set of cases (class + continous attribute pairs).<P><DD><DL></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>cases</CODE> - training data for creation of a discretizer.</DL></DD></DL><HR><A NAME="discretize(double)"><!-- --></A><H3>discretize</H3><PRE>public int <B>discretize</B>(double v)</PRE><DL><DD>Discretize single continous value. A discretizer must be build before calling this method.<P><DD><DL></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>v</CODE> - value to discretize.<DT><B>Returns:</B><DD>label of a discretizer value.</DL></DD></DL><HR><A NAME="getPartitionBoundaries()"><!-- --></A><H3>getPartitionBoundaries</H3><PRE>public double[] <B>getPartitionBoundaries</B>()</PRE><DL><DD>Return array representing partition boundaries. The first partition corresponds to interval from negative infinity to first partition point (inclusively). The second partition streaches from first boundary point (exclusively) to second boundary point (inclusively). And so on. The last partition streaches from last boundary point (exclusively) to positive infinity.<P><DD><DL></DL></DD><DD><DL><DT><B>Returns:</B><DD>Array representing partition boundaries.</DL></DD></DL><HR><A NAME="getPartitionNames()"><!-- --></A><H3>getPartitionNames</H3><PRE>public java.lang.String[] <B>getPartitionNames</B>()</PRE><DL><DD>Return symbolic names describing discretization partitions. Number of partitions is one more than number of partition boundaries.<P><DD><DL></DL></DD><DD><DL><DT><B>Returns:</B><DD>Names describing discretization partitions.<DT><B>See Also:</B><DD><A HREF="../../jbnc/discretize/EntropyDiscretizer.html#getPartitionBoundaries()"><CODE>getPartitionBoundaries()</CODE></A></DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ======= START OF BOTTOM NAVBAR ====== --><A NAME="navbar_bottom"><!-- --></A><A HREF="#skip-navbar_bottom" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> <a href="http://jbnc.sourceforge.net"> <img src="http://sourceforge.net/sflogo.php?group_id=49871&type=1" width="88" height="31" border="0" alt="SourceForge.net Logo"> </a> </EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../jbnc/discretize/Case.html" title="class in jbnc.discretize"><B>PREV CLASS</B></A> NEXT CLASS</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html?jbnc/discretize/EntropyDiscretizer.html" target="_top"><B>FRAMES</B></A> <A HREF="EntropyDiscretizer.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_bottom"></A><!-- ======== END OF BOTTOM NAVBAR ======= --><HR></BODY></HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -