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< 数据挖掘--实用机器学习技术及java实现> 一书结合数据挖掘和机器学习的知识,作者陈述了自动挖掘模式的基础理论,并且以java语言实现了具有代表性的各类数据挖掘方法.例如:class

</DD>
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<HR>

<A NAME="generateRules(double, weka.core.FastVector, int)"><!-- --></A><H3>
generateRules</H3>
<PRE>
public final <A HREF="../../weka/core/FastVector.html">FastVector</A>[] <B>generateRules</B>(double&nbsp;minConfidence,
                                        <A HREF="../../weka/core/FastVector.html">FastVector</A>&nbsp;hashtables,
                                        int&nbsp;numItemsInSet)</PRE>
<DL>
<DD>Generates all rules for an item set.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>minConfidence</CODE> - the minimum confidence the rules have to have<DD><CODE>hashtables</CODE> - containing all(!) previously generated
 item sets<DD><CODE>numItemsInSet</CODE> - the size of the item set for which the rules
 are to be generated<DT><B>Returns:</B><DD>all the rules with minimum confidence for the given item set</DL>
</DD>
</DL>
<HR>

<A NAME="generateRulesBruteForce(double, int, weka.core.FastVector, int, int, double)"><!-- --></A><H3>
generateRulesBruteForce</H3>
<PRE>
public final <A HREF="../../weka/core/FastVector.html">FastVector</A>[] <B>generateRulesBruteForce</B>(double&nbsp;minMetric,
                                                  int&nbsp;metricType,
                                                  <A HREF="../../weka/core/FastVector.html">FastVector</A>&nbsp;hashtables,
                                                  int&nbsp;numItemsInSet,
                                                  int&nbsp;numTransactions,
                                                  double&nbsp;significanceLevel)
                                           throws java.lang.Exception</PRE>
<DL>
<DD>Generates all significant rules for an item set.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>minMetric</CODE> - the minimum metric (confidence, lift, leverage, 
 improvement) the rules have to have<DD><CODE>metricType</CODE> - (confidence=0, lift, leverage, improvement)<DD><CODE>hashtables</CODE> - containing all(!) previously generated
 item sets<DD><CODE>numItemsInSet</CODE> - the size of the item set for which the rules
 are to be generated<DD><CODE>the</CODE> - significance level for testing the rules<DT><B>Returns:</B><DD>all the rules with minimum metric for the given item set<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if something goes wrong</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">FastVector</A>&nbsp;itemSets,
                                               int&nbsp;initialSize)</PRE>
<DL>
<DD>Return a hashtable filled with the given item sets.<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 final int <B>hashCode</B>()</PRE>
<DL>
<DD>Produces a hash code for a item set.<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">FastVector</A> <B>mergeAllItemSets</B>(<A HREF="../../weka/core/FastVector.html">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.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><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">FastVector</A> <B>pruneItemSets</B>(<A HREF="../../weka/core/FastVector.html">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.<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">FastVector</A>[]&nbsp;rules,
                              double&nbsp;minConfidence)</PRE>
<DL>
<DD>Prunes a set of rules.<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>
</DL>
<HR>

<A NAME="singletons(weka.core.Instances)"><!-- --></A><H3>
singletons</H3>
<PRE>
public static <A HREF="../../weka/core/FastVector.html">FastVector</A> <B>singletons</B>(<A HREF="../../weka/core/Instances.html">Instances</A>&nbsp;instances)
                             throws java.lang.Exception</PRE>
<DL>
<DD>Converts the header info of the given set of instances into a set 
 of item sets (singletons). The ordering of values in the header file 
 determines the lexicographic order.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>instances</CODE> - the set of instances whose header info is to be used<DT><B>Returns:</B><DD>a set of item sets, each containing a single item<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if singletons can't be generated successfully</DL>
</DD>
</DL>
<HR>

<A NAME="subtract(weka.associations.ItemSet)"><!-- --></A><H3>
subtract</H3>
<PRE>
public final <A HREF="../../weka/associations/ItemSet.html">ItemSet</A> <B>subtract</B>(<A HREF="../../weka/associations/ItemSet.html">ItemSet</A>&nbsp;toSubtract)</PRE>
<DL>
<DD>Subtracts an item set from another one.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>toSubtract</CODE> - the item set to be subtracted from this one.<DT><B>Returns:</B><DD>an item set that only contains items form this item sets that
 are not contained by toSubtract</DL>
</DD>
</DL>
<HR>

<A NAME="support()"><!-- --></A><H3>
support</H3>
<PRE>
public final int <B>support</B>()</PRE>
<DL>
<DD>Outputs the support for an item set.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the support</DL>
</DD>
</DL>
<HR>

<A NAME="toString(weka.core.Instances)"><!-- --></A><H3>
toString</H3>
<PRE>
public final java.lang.String <B>toString</B>(<A HREF="../../weka/core/Instances.html">Instances</A>&nbsp;instances)</PRE>
<DL>
<DD>Returns the contents of an item set as a string.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>instances</CODE> - contains the relevant header information<DT><B>Returns:</B><DD>string describing the item set</DL>
</DD>
</DL>
<HR>

<A NAME="upDateCounter(weka.core.Instance)"><!-- --></A><H3>
upDateCounter</H3>
<PRE>
public final void <B>upDateCounter</B>(<A HREF="../../weka/core/Instance.html">Instance</A>&nbsp;instance)</PRE>
<DL>
<DD>Updates counter of item set with respect to given transaction.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>instance</CODE> - the instance to be used for ubdating the counter</DL>
</DD>
</DL>
<HR>

<A NAME="upDateCounters(weka.core.FastVector, weka.core.Instances)"><!-- --></A><H3>
upDateCounters</H3>
<PRE>
public static void <B>upDateCounters</B>(<A HREF="../../weka/core/FastVector.html">FastVector</A>&nbsp;itemSets,
                                  <A HREF="../../weka/core/Instances.html">Instances</A>&nbsp;instances)</PRE>
<DL>
<DD>Updates counters for a set of item sets and a set of instances.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>itemSets</CODE> - the set of item sets which are to be updated<DD><CODE>instances</CODE> - the instances to be used for updating the counters</DL>
</DD>
</DL>
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