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<!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 1.4.2_05) on Mon Mar 07 15:27:45 NZDT 2005 --><TITLE>BinarySparseInstance</TITLE><META NAME="keywords" CONTENT="weka.core.BinarySparseInstance class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="BinarySparseInstance";}</SCRIPT></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=3 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="../../../Tutorial.pdf"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="http://www.cs.waikato.ac.nz/ml/weka/index.html"><FONT CLASS="NavBarFont1"><B>Weka's home</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../weka/core/AttributeStats.html" title="class in weka.core"><B>PREV CLASS</B></A> <A HREF="../../weka/core/CheckOptionHandler.html" title="class in weka.core"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="BinarySparseInstance.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">weka.core</FONT><BR>Class BinarySparseInstance</H2><PRE>java.lang.Object <IMG SRC="../../resources/inherit.gif" ALT="extended by"><A HREF="../../weka/core/Instance.html" title="class in weka.core">weka.core.Instance</A> <IMG SRC="../../resources/inherit.gif" ALT="extended by"><A HREF="../../weka/core/SparseInstance.html" title="class in weka.core">weka.core.SparseInstance</A> <IMG SRC="../../resources/inherit.gif" ALT="extended by"><B>weka.core.BinarySparseInstance</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../weka/core/Copyable.html" title="interface in weka.core">Copyable</A>, java.io.Serializable</DD></DL><HR><DL><DT>public class <B>BinarySparseInstance</B><DT>extends <A HREF="../../weka/core/SparseInstance.html" title="class in weka.core">SparseInstance</A></DL><P>Class for storing a binary-data-only instance as a sparse vector. A sparse instance only requires storage for those attribute values that are non-zero. Since the objective is to reduce storage requirements for datasets with large numbers of default values, this also includes nominal attributes -- the first nominal value (i.e. that which has index 0) will not require explicit storage, so rearrange your nominal attribute value orderings if necessary. Missing values are not supported, and will be treated as 1 (true).<P><P><DL><DT><B>See Also:</B><DD><A HREF="../../serialized-form.html#weka.core.BinarySparseInstance">Serialized Form</A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/core/BinarySparseInstance.html#BinarySparseInstance(double, double[])">BinarySparseInstance</A></B>(double weight, double[] attValues)</CODE><BR> Constructor that generates a sparse instance from the given parameters.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/core/BinarySparseInstance.html#BinarySparseInstance(double, int[], int)">BinarySparseInstance</A></B>(double weight, int[] indices, int maxNumValues)</CODE><BR> Constructor that inititalizes instance variable with given values.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/core/BinarySparseInstance.html#BinarySparseInstance(weka.core.Instance)">BinarySparseInstance</A></B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> instance)</CODE><BR> Constructor that generates a sparse instance from the given instance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/core/BinarySparseInstance.html#BinarySparseInstance(int)">BinarySparseInstance</A></B>(int numAttributes)</CODE><BR> Constructor of an instance that sets weight to one, all values to 1, and the reference to the dataset to null.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../weka/core/BinarySparseInstance.html#BinarySparseInstance(weka.core.SparseInstance)">BinarySparseInstance</A></B>(<A HREF="../../weka/core/SparseInstance.html" title="class in weka.core">SparseInstance</A> instance)</CODE><BR> Constructor that copies the info from the given instance.</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"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Object</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/BinarySparseInstance.html#copy()">copy</A></B>()</CODE><BR> Produces a shallow copy of this instance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/BinarySparseInstance.html#main(java.lang.String[])">main</A></B>(java.lang.String[] options)</CODE><BR> Main method for testing this class.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../weka/core/BinarySparseInstance.html#mergeInstance(weka.core.Instance)">mergeInstance</A></B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> inst)</CODE><BR> Merges this instance with the given instance and returns the result.</TD></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="../../weka/core/BinarySparseInstance.html#replaceMissingValues(double[])">replaceMissingValues</A></B>(double[] array)</CODE><BR> Does nothing, since we don't support missing values.</TD></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="../../weka/core/BinarySparseInstance.html#setValue(int, double)">setValue</A></B>(int attIndex, double value)</CODE><BR> Sets a specific value in the instance to the given value (internal floating-point format).</TD></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="../../weka/core/BinarySparseInstance.html#setValueSparse(int, double)">setValueSparse</A></B>(int indexOfIndex, double value)</CODE><BR> Sets a specific value in the instance to the given value (internal floating-point format).</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="../../weka/core/BinarySparseInstance.html#toDoubleArray()">toDoubleArray</A></B>()</CODE><BR> Returns the values of each attribute as an array of doubles.</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="../../weka/core/BinarySparseInstance.html#toString()">toString</A></B>()</CODE><BR> Returns the description of one instance in sparse format.</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="../../weka/core/BinarySparseInstance.html#value(int)">value</A></B>(int attIndex)</CODE><BR> Returns an instance's attribute value in internal format.</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="../../weka/core/BinarySparseInstance.html#valueSparse(int)">valueSparse</A></B>(int indexOfIndex)</CODE><BR> Returns an instance's attribute value in internal format.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_weka.core.SparseInstance"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class weka.core.<A HREF="../../weka/core/SparseInstance.html" title="class in weka.core">SparseInstance</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../weka/core/SparseInstance.html#attributeSparse(int)">attributeSparse</A>, <A HREF="../../weka/core/SparseInstance.html#index(int)">index</A>, <A HREF="../../weka/core/SparseInstance.html#isMissing(int)">isMissing</A>, <A HREF="../../weka/core/SparseInstance.html#locateIndex(int)">locateIndex</A>, <A HREF="../../weka/core/SparseInstance.html#numAttributes()">numAttributes</A>, <A HREF="../../weka/core/SparseInstance.html#numValues()">numValues</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_weka.core.Instance"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class weka.core.<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../weka/core/Instance.html#attribute(int)">attribute</A>, <A HREF="../../weka/core/Instance.html#classAttribute()">classAttribute</A>, <A HREF="../../weka/core/Instance.html#classIndex()">classIndex</A>, <A HREF="../../weka/core/Instance.html#classIsMissing()">classIsMissing</A>, <A HREF="../../weka/core/Instance.html#classValue()">classValue</A>, <A HREF="../../weka/core/Instance.html#dataset()">dataset</A>, <A HREF="../../weka/core/Instance.html#deleteAttributeAt(int)">deleteAttributeAt</A>, <A HREF="../../weka/core/Instance.html#enumerateAttributes()">enumerateAttributes</A>, <A HREF="../../weka/core/Instance.html#equalHeaders(weka.core.Instance)">equalHeaders</A>, <A HREF="../../weka/core/Instance.html#hasMissingValue()">hasMissingValue</A>, <A HREF="../../weka/core/Instance.html#insertAttributeAt(int)">insertAttributeAt</A>, <A HREF="../../weka/core/Instance.html#isMissing(weka.core.Attribute)">isMissing</A>, <A HREF="../../weka/core/Instance.html#isMissingSparse(int)">isMissingSparse</A>, <A HREF="../../weka/core/Instance.html#isMissingValue(double)">isMissingValue</A>, <A HREF="../../weka/core/Instance.html#missingValue()">missingValue</A>, <A HREF="../../weka/core/Instance.html#numClasses()">numClasses</A>, <A HREF="../../weka/core/Instance.html#setClassMissing()">setClassMissing</A>, <A HREF="../../weka/core/Instance.html#setClassValue(double)">setClassValue</A>, <A HREF="../../weka/core/Instance.html#setClassValue(java.lang.String)">setClassValue</A>, <A HREF="../../weka/core/Instance.html#setDataset(weka.core.Instances)">setDataset</A>, <A HREF="../../weka/core/Instance.html#setMissing(weka.core.Attribute)">setMissing</A>, <A HREF="../../weka/core/Instance.html#setMissing(int)">setMissing</A>, <A HREF="../../weka/core/Instance.html#setValue(weka.core.Attribute, double)">setValue</A>, <A HREF="../../weka/core/Instance.html#setValue(weka.core.Attribute, java.lang.String)">setValue</A>, <A HREF="../../weka/core/Instance.html#setValue(int, java.lang.String)">setValue</A>, <A HREF="../../weka/core/Instance.html#setWeight(double)">setWeight</A>, <A HREF="../../weka/core/Instance.html#stringValue(weka.core.Attribute)">stringValue</A>, <A HREF="../../weka/core/Instance.html#stringValue(int)">stringValue</A>, <A HREF="../../weka/core/Instance.html#toString(weka.core.Attribute)">toString</A>, <A HREF="../../weka/core/Instance.html#toString(int)">toString</A>, <A HREF="../../weka/core/Instance.html#value(weka.core.Attribute)">value</A>, <A HREF="../../weka/core/Instance.html#weight()">weight</A></CODE></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"><TD><B>Methods inherited from class java.lang.Object</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>equals, getClass, hashCode, notify, notifyAll, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TD></TR></TABLE><A NAME="BinarySparseInstance(weka.core.Instance)"><!-- --></A><H3>BinarySparseInstance</H3><PRE>public <B>BinarySparseInstance</B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> instance)</PRE><DL><DD>Constructor that generates a sparse instance from the given instance. Reference to the dataset is set to null. (ie. the instance doesn't have access to information about the⌨️ 快捷键说明
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