rankstatistics.html

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<A NAME="RankStatistics()"><!-- --></A><H3>
RankStatistics</H3>
<PRE>
public <B>RankStatistics</B>()</PRE>
<DL>
</DL>

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<A NAME="rho(com.rapidminer.example.ExampleSet, com.rapidminer.example.Attribute, com.rapidminer.example.Attribute, double)"><!-- --></A><H3>
rho</H3>
<PRE>
public static double <B>rho</B>(<A HREF="../../../../com/rapidminer/example/ExampleSet.html" title="interface in com.rapidminer.example">ExampleSet</A>&nbsp;eSet,
                         <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;a,
                         <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;b,
                         double&nbsp;f)
                  throws <A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></PRE>
<DL>
<DD>Calculates the Spearman rank correlation between two attributes.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>eSet</CODE> - the example set<DD><CODE>a</CODE> - the first attribute to correlate<DD><CODE>b</CODE> - the second attribute to correlate<DD><CODE>f</CODE> - a fuzz factor (allowance for imprecision) when ranking
<DT><B>Returns:</B><DD>the rank correlation
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="rho(com.rapidminer.example.ExampleSet, com.rapidminer.example.Attribute, com.rapidminer.example.Attribute)"><!-- --></A><H3>
rho</H3>
<PRE>
public static double <B>rho</B>(<A HREF="../../../../com/rapidminer/example/ExampleSet.html" title="interface in com.rapidminer.example">ExampleSet</A>&nbsp;eSet,
                         <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;a,
                         <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;b)
                  throws <A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></PRE>
<DL>
<DD>Calculates the Spearman rank correlation between two attributes.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>eSet</CODE> - the example set<DD><CODE>a</CODE> - the first attribute to correlate<DD><CODE>b</CODE> - the second attribute to correlate
<DT><B>Returns:</B><DD>the rank correlation
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="rank(com.rapidminer.example.ExampleSet, com.rapidminer.example.Attribute, com.rapidminer.example.Attribute, double)"><!-- --></A><H3>
rank</H3>
<PRE>
public static double[] <B>rank</B>(<A HREF="../../../../com/rapidminer/example/ExampleSet.html" title="interface in com.rapidminer.example">ExampleSet</A>&nbsp;eSet,
                            <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;att,
                            <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;mappingAtt,
                            double&nbsp;fuzz)</PRE>
<DL>
<DD>Calculates ranks for an attribute.
 
 Ranks are returned as double precision values, with 1 as the
 rank of the smallest value. Values within +/- fuzz of each other
 may be considered tied.  Tied values receive identical ranks.
 Missing values receive rank NaN.
 
 Note that application of the "fuzz" factor is dependent on the
 order of the observations in the example set.  For instance, if
 the first three values encountered are x, x+fuzz and x+2*fuzz,
 the first two will be considered tied but the third will not, 
 since x+2*fuzz is not within +/- fuzz of x.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>eSet</CODE> - the example set<DD><CODE>att</CODE> - the attribute to rank<DD><CODE>fuzz</CODE> - values within +/- fuzz may be considered tied
<DT><B>Returns:</B><DD>a double precision array of ranks</DL>
</DD>
</DL>
<HR>

<A NAME="rank(com.rapidminer.example.ExampleSet, com.rapidminer.example.Attribute, com.rapidminer.example.Attribute)"><!-- --></A><H3>
rank</H3>
<PRE>
public static double[] <B>rank</B>(<A HREF="../../../../com/rapidminer/example/ExampleSet.html" title="interface in com.rapidminer.example">ExampleSet</A>&nbsp;eSet,
                            <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;att,
                            <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;mappingAtt)</PRE>
<DL>
<DD>Calculates ranks for an attribute.
 
 Ranks are returned as double precision values, with 1 as the
 rank of the smallest value.  Tied values receive identical ranks.
 Missing values receive rank NaN.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>eSet</CODE> - the example set<DD><CODE>att</CODE> - the attribute to rank<DD><CODE>mappingAtt</CODE> - the attribute which might be used for remapping the values
<DT><B>Returns:</B><DD>a double precision array of ranks</DL>
</DD>
</DL>
<HR>

<A NAME="tau_b(com.rapidminer.example.ExampleSet, com.rapidminer.example.Attribute, com.rapidminer.example.Attribute)"><!-- --></A><H3>
tau_b</H3>
<PRE>
public static double <B>tau_b</B>(<A HREF="../../../../com/rapidminer/example/ExampleSet.html" title="interface in com.rapidminer.example">ExampleSet</A>&nbsp;eSet,
                           <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;a,
                           <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;b)
                    throws <A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></PRE>
<DL>
<DD>Computes Kendall's tau-b rank correlation statistic, ignoring
 examples containing missing values.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>eSet</CODE> - the example set<DD><CODE>a</CODE> - the first attribute to correlate<DD><CODE>b</CODE> - the second attribute to correlate
<DT><B>Returns:</B><DD>Kendall's tau-b rank correlation
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="tau_b(com.rapidminer.example.ExampleSet, com.rapidminer.example.Attribute, com.rapidminer.example.Attribute, double)"><!-- --></A><H3>
tau_b</H3>
<PRE>
public static double <B>tau_b</B>(<A HREF="../../../../com/rapidminer/example/ExampleSet.html" title="interface in com.rapidminer.example">ExampleSet</A>&nbsp;eSet,
                           <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;a,
                           <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;b,
                           double&nbsp;fuzz)
                    throws <A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></PRE>
<DL>
<DD>Computes Kendall's tau-b rank correlation statistic, ignoring
 examples containing missing values, with approximate comparisons.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>eSet</CODE> - the example set<DD><CODE>a</CODE> - the first attribute to correlate<DD><CODE>b</CODE> - the second attribute to correlate<DD><CODE>fuzz</CODE> - values within +/- fuzz may be considered tied
<DT><B>Returns:</B><DD>Kendall's tau-b rank correlation
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></CODE></DL>
</DD>
</DL>
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