itemset.html

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the counter</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../weka/associations/ItemSet.html#setItem(int[])">setItem</A></B>(int[]&nbsp;items)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets an item sets</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../weka/associations/ItemSet.html#setItemAt(int, int)">setItemAt</A></B>(int&nbsp;value,
          int&nbsp;k)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the index of an attribute value</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../weka/associations/ItemSet.html#singletons(weka.core.Instances)">singletons</A></B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;instances)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Converts the header info of the given set of instances into a set 
 of item sets (singletons).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../weka/associations/ItemSet.html#support()">support</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Outputs the support for an item set.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../weka/associations/ItemSet.html#toString(weka.core.Instances)">toString</A></B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;instances)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the contents of an item set as a string.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../weka/associations/ItemSet.html#upDateCounter(weka.core.Instance)">upDateCounter</A></B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;instance)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Updates counter of item set with respect to given transaction.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../weka/associations/ItemSet.html#upDateCounters(weka.core.FastVector, weka.core.Instances)">upDateCounters</A></B>(<A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A>&nbsp;itemSets,
               <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;instances)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Updates counters for a set of item sets and a set of instances.</TD>
</TR>
</TABLE>
&nbsp;<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>getClass, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
&nbsp;
<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="ItemSet(int)"><!-- --></A><H3>
ItemSet</H3>
<PRE>
public <B>ItemSet</B>(int&nbsp;totalTrans)</PRE>
<DL>
<DD>Constructor
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>totalTrans</CODE> - the total number of transactions in the data</DL>
</DL>
<HR>

<A NAME="ItemSet(int, int[])"><!-- --></A><H3>
ItemSet</H3>
<PRE>
public <B>ItemSet</B>(int&nbsp;totalTrans,
               int[]&nbsp;array)</PRE>
<DL>
<DD>Constructor
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>totalTrans</CODE> - the total number of transactions in the data<DD><CODE>array</CODE> - the attribute values encoded in an int array</DL>
</DL>
<HR>

<A NAME="ItemSet(int[])"><!-- --></A><H3>
ItemSet</H3>
<PRE>
public <B>ItemSet</B>(int[]&nbsp;array)</PRE>
<DL>
<DD>Contsructor
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>array</CODE> - the item set represented as an int array</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="containedBy(weka.core.Instance)"><!-- --></A><H3>
containedBy</H3>
<PRE>
public boolean <B>containedBy</B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;instance)</PRE>
<DL>
<DD>Checks if an instance contains an item set.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>instance</CODE> - the instance to be tested
<DT><B>Returns:</B><DD>true if the given instance contains this item set</DL>
</DD>
</DL>
<HR>

<A NAME="deleteItemSets(weka.core.FastVector, int, int)"><!-- --></A><H3>
deleteItemSets</H3>
<PRE>
public static <A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A> <B>deleteItemSets</B>(<A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A>&nbsp;itemSets,
                                        int&nbsp;minSupport,
                                        int&nbsp;maxSupport)</PRE>
<DL>
<DD>Deletes all item sets that don't have minimum support.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>maxSupport</CODE> - the maximum support<DD><CODE>itemSets</CODE> - the set of item sets to be pruned<DD><CODE>minSupport</CODE> - the minimum number of transactions to be covered
<DT><B>Returns:</B><DD>the reduced set of item sets</DL>
</DD>
</DL>
<HR>

<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public boolean <B>equals</B>(java.lang.Object&nbsp;itemSet)</PRE>
<DL>
<DD>Tests if two item sets are equal.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>equals</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>itemSet</CODE> - another item set
<DT><B>Returns:</B><DD>true if this item set contains the same items as the given one</DL>
</DD>
</DL>
<HR>

<A NAME="getHashtable(weka.core.FastVector, int)"><!-- --></A><H3>
getHashtable</H3>
<PRE>
public static java.util.Hashtable <B>getHashtable</B>(<A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A>&nbsp;itemSets,
                                               int&nbsp;initialSize)</PRE>
<DL>
<DD>Return a hashtable filled with the given item sets.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>itemSets</CODE> - the set of item sets to be used for filling the hash table<DD><CODE>initialSize</CODE> - the initial size of the hashtable
<DT><B>Returns:</B><DD>the generated hashtable</DL>
</DD>
</DL>
<HR>

<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public int <B>hashCode</B>()</PRE>
<DL>
<DD>Produces a hash code for a item set.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>hashCode</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a hash code for a set of items</DL>
</DD>
</DL>
<HR>

<A NAME="mergeAllItemSets(weka.core.FastVector, int, int)"><!-- --></A><H3>
mergeAllItemSets</H3>
<PRE>
public static <A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A> <B>mergeAllItemSets</B>(<A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A>&nbsp;itemSets,
                                          int&nbsp;size,
                                          int&nbsp;totalTrans)</PRE>
<DL>
<DD>Merges all item sets in the set of (k-1)-item sets
 to create the (k)-item sets and updates the counters.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>totalTrans</CODE> - thetotal number of transactions<DD><CODE>itemSets</CODE> - the set of (k-1)-item sets<DD><CODE>size</CODE> - the value of (k-1)
<DT><B>Returns:</B><DD>the generated (k)-item sets</DL>
</DD>
</DL>
<HR>

<A NAME="pruneItemSets(weka.core.FastVector, java.util.Hashtable)"><!-- --></A><H3>
pruneItemSets</H3>
<PRE>
public static <A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A> <B>pruneItemSets</B>(<A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A>&nbsp;toPrune,
                                       java.util.Hashtable&nbsp;kMinusOne)</PRE>
<DL>
<DD>Prunes a set of (k)-item sets using the given (k-1)-item sets.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>toPrune</CODE> - the set of (k)-item sets to be pruned<DD><CODE>kMinusOne</CODE> - the (k-1)-item sets to be used for pruning
<DT><B>Returns:</B><DD>the pruned set of item sets</DL>
</DD>
</DL>
<HR>

<A NAME="pruneRules(weka.core.FastVector[], double)"><!-- --></A><H3>
pruneRules</H3>
<PRE>
public static void <B>pruneRules</B>(<A HREF="../../weka/core/FastVector.html" title="class in weka.core">FastVector</A>[]&nbsp;rules,
                              double&nbsp;minConfidence)</PRE>
<DL>
<DD>Prunes a set of rules.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rules</CODE> - a two-dimensional array of lists of item sets. The first list
 of item sets contains the premises, the second one the consequences.<DD><CODE>minConfidence</CODE> - the minimum confidence the rules have to have</DL>
</DD>