evaluation.html

< 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

</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the number of classes</DL>
</DD>
</DL>
<HR>

<A NAME="numFolds()"><!-- --></A><H3>
numFolds</H3>
<PRE>
public final int <B>numFolds</B>()</PRE>
<DL>
<DD>Gets the number of folds to be done in the cross-validation step.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the number of folds</DL>
</DD>
</DL>
<HR>

<A NAME="incorrect()"><!-- --></A><H3>
incorrect</H3>
<PRE>
public final double <B>incorrect</B>()</PRE>
<DL>
<DD>Gets the number of instances incorrectly classified (that is, for
 which an incorrect prediction was made). (Actually the sum of the
 weights of these instances)<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the number of incorrectly classified instances</DL>
</DD>
</DL>
<HR>

<A NAME="correct()"><!-- --></A><H3>
correct</H3>
<PRE>
public final double <B>correct</B>()</PRE>
<DL>
<DD>Gets the number of instances correctly classified (that is, for
 which a correct prediction was made). (Actually the sum of the weights
 of these instances)<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the number of correctly classified instances</DL>
</DD>
</DL>
<HR>

<A NAME="unclassified()"><!-- --></A><H3>
unclassified</H3>
<PRE>
public final double <B>unclassified</B>()</PRE>
<DL>
<DD>Gets the number of instances not classified (that is, for
 which no prediction was made by the classifier). (Actually the sum
 of the weights of these instances)<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the number of unclassified instances</DL>
</DD>
</DL>
<HR>

<A NAME="missingClass()"><!-- --></A><H3>
missingClass</H3>
<PRE>
public final double <B>missingClass</B>()</PRE>
<DL>
<DD>Gets the value of the missingClass variable<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the missingClass variable</DL>
</DD>
</DL>
<HR>

<A NAME="withClass()"><!-- --></A><H3>
withClass</H3>
<PRE>
public final double <B>withClass</B>()</PRE>
<DL>
<DD>Gets the value of the withClass variable<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the withClass variable</DL>
</DD>
</DL>
<HR>

<A NAME="confusionMatrix()"><!-- --></A><H3>
confusionMatrix</H3>
<PRE>
public double[][] <B>confusionMatrix</B>()</PRE>
<DL>
<DD>Returns a copy of the confusion matrix.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a copy of the confusion matrix as a two-dimensional array</DL>
</DD>
</DL>
<HR>

<A NAME="classNames()"><!-- --></A><H3>
classNames</H3>
<PRE>
public java.lang.String[] <B>classNames</B>()</PRE>
<DL>
<DD>Returns a copy of the classNames array.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a copy of the classNames array</DL>
</DD>
</DL>
<HR>

<A NAME="classPriors()"><!-- --></A><H3>
classPriors</H3>
<PRE>
public double[] <B>classPriors</B>()</PRE>
<DL>
<DD>Tells whether or not the class is nominal.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a boolean telling whether or not the class is nominal.
public final boolean classIsNominal()
{
return m_ClassIsNominal;
}

/**
 Gets a copy of the classPriors array.</DL>
</DD>
</DL>
<HR>

<A NAME="classPriorsSum()"><!-- --></A><H3>
classPriorsSum</H3>
<PRE>
public final double <B>classPriorsSum</B>()</PRE>
<DL>
<DD>Gets the value of the classPriorsSum variable<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the classPriorsSum variable</DL>
</DD>
</DL>
<HR>

<A NAME="costMatrix()"><!-- --></A><H3>
costMatrix</H3>
<PRE>
public <A HREF="../../weka/classifiers/CostMatrix.html">CostMatrix</A> <B>costMatrix</B>()</PRE>
<DL>
<DD>Gets a copy of the cost matrix.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a copy of the cost matrix</DL>
</DD>
</DL>
<HR>

<A NAME="totalCost()"><!-- --></A><H3>
totalCost</H3>
<PRE>
public final double <B>totalCost</B>()</PRE>
<DL>
<DD>Gets the total cost, that is, the cost of each prediction times the
 weight of the instance, summed over all instances.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the total cost</DL>
</DD>
</DL>
<HR>

<A NAME="sumErr()"><!-- --></A><H3>
sumErr</H3>
<PRE>
public final double <B>sumErr</B>()</PRE>
<DL>
<DD>Gets the value of the sumErr variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumErr variable.</DL>
</DD>
</DL>
<HR>

<A NAME="sumAbsErr()"><!-- --></A><H3>
sumAbsErr</H3>
<PRE>
public final double <B>sumAbsErr</B>()</PRE>
<DL>
<DD>Gets the value of the sumAbsErr variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumAbsErr variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumSqrErr()"><!-- --></A><H3>
sumSqrErr</H3>
<PRE>
public final double <B>sumSqrErr</B>()</PRE>
<DL>
<DD>Gets the value of the sumSqrErr variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumSqrErr variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumClass()"><!-- --></A><H3>
sumClass</H3>
<PRE>
public final double <B>sumClass</B>()</PRE>
<DL>
<DD>Gets the value of the sumClass variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumClass variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumSqrClass()"><!-- --></A><H3>
sumSqrClass</H3>
<PRE>
public final double <B>sumSqrClass</B>()</PRE>
<DL>
<DD>Gets the value of the sumSqrClass variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumSqrClass variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumPredicted()"><!-- --></A><H3>
sumPredicted</H3>
<PRE>
public final double <B>sumPredicted</B>()</PRE>
<DL>
<DD>Gets the value of the sumPredicted variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumPredicted variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumSqrPredicted()"><!-- --></A><H3>
sumSqrPredicted</H3>
<PRE>
public final double <B>sumSqrPredicted</B>()</PRE>
<DL>
<DD>Gets the value of the sumSqrPredicted variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumSqrPredicted variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumClassPredicted()"><!-- --></A><H3>
sumClassPredicted</H3>
<PRE>
public final double <B>sumClassPredicted</B>()</PRE>
<DL>
<DD>Gets the value of the sumClassPredicted variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumClassPredicted variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumPriorAbsErr()"><!-- --></A><H3>
sumPriorAbsErr</H3>
<PRE>
public final double <B>sumPriorAbsErr</B>()</PRE>
<DL>
<DD>Gets the value of the sumPriorAbsError variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumPriorAbsError variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumPriorSqrErr()"><!-- --></A><H3>
sumPriorSqrErr</H3>
<PRE>
public final double <B>sumPriorSqrErr</B>()</PRE>
<DL>
<DD>Gets the value of the sumPriorSqrErr variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumPriorSqrErr variable</DL>
</DD>
</DL>
<HR>

<A NAME="sumKBInfo()"><!-- --></A><H3>
sumKBInfo</H3>
<PRE>
public final double <B>sumKBInfo</B>()</PRE>
<DL>
<DD>Gets the value of the sumKBInfo variable.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the value of the sumKBInfo variable</DL>
</DD>
</DL>
<HR>