sparseinstance.html

数据挖掘的最常用工具。由于开源

<DT><B>Returns:</B><DD>the merged instances</DL>
</DD>
</DL>
<HR>

<A NAME="numAttributes()"><!-- --></A><H3>
numAttributes</H3>
<PRE>
public int <B>numAttributes</B>()</PRE>
<DL>
<DD>Returns the number of attributes.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#numAttributes()">numAttributes</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the number of attributes as an integer</DL>
</DD>
</DL>
<HR>

<A NAME="numValues()"><!-- --></A><H3>
numValues</H3>
<PRE>
public int <B>numValues</B>()</PRE>
<DL>
<DD>Returns the number of values in the sparse vector.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#numValues()">numValues</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>

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

<A NAME="replaceMissingValues(double[])"><!-- --></A><H3>
replaceMissingValues</H3>
<PRE>
public void <B>replaceMissingValues</B>(double[]&nbsp;array)</PRE>
<DL>
<DD>Replaces all missing values in the instance with the 
 values contained in the given array. A deep copy of
 the vector of attribute values is performed before the
 values are replaced.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#replaceMissingValues(double[])">replaceMissingValues</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>array</CODE> - containing the means and modes
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if numbers of attributes are unequal</DL>
</DD>
</DL>
<HR>

<A NAME="setValue(int, double)"><!-- --></A><H3>
setValue</H3>
<PRE>
public void <B>setValue</B>(int&nbsp;attIndex,
                     double&nbsp;value)</PRE>
<DL>
<DD>Sets a specific value in the instance to the given value 
 (internal floating-point format). Performs a deep copy
 of the vector of attribute values before the value is set.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#setValue(int, double)">setValue</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attIndex</CODE> - the attribute's index<DD><CODE>value</CODE> - the new attribute value (If the corresponding
 attribute is nominal (or a string) then this is the new value's
 index as a double).</DL>
</DD>
</DL>
<HR>

<A NAME="setValueSparse(int, double)"><!-- --></A><H3>
setValueSparse</H3>
<PRE>
public void <B>setValueSparse</B>(int&nbsp;indexOfIndex,
                           double&nbsp;value)</PRE>
<DL>
<DD>Sets a specific value in the instance to the given value 
 (internal floating-point format). Performs a deep copy
 of the vector of attribute values before the value is set.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#setValueSparse(int, double)">setValueSparse</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>indexOfIndex</CODE> - the index of the attribute's index<DD><CODE>value</CODE> - the new attribute value (If the corresponding
 attribute is nominal (or a string) then this is the new value's
 index as a double).</DL>
</DD>
</DL>
<HR>

<A NAME="modifyValue(int, double)"><!-- --></A><H3>
modifyValue</H3>
<PRE>
public void <B>modifyValue</B>(int&nbsp;attIndex,
                        double&nbsp;value)</PRE>
<DL>
<DD>Modifies the instances value for an attribute (floating point
 representation). Unlike in <code>setValue</code> no deep copy is
 produced, i.e. the actual value is modified. Note, this implementation
 actually performs an internal copying of protected arrays if the old or
 the new value are different from zero, i.e. if classes of the same package
 hold references to these arrays they will not see the modified attribute
 instance value (avoid direct access to these protected arrays).
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#modifyValue(int, double)">modifyValue</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attIndex</CODE> - the attribute's index<DD><CODE>value</CODE> - the new attribute value (If the corresponding
 attribute is nominal (or a string) then this is the new value's
 index as a double).</DL>
</DD>
</DL>
<HR>

<A NAME="toDoubleArray()"><!-- --></A><H3>
toDoubleArray</H3>
<PRE>
public double[] <B>toDoubleArray</B>()</PRE>
<DL>
<DD>Returns the values of each attribute as an array of doubles.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#toDoubleArray()">toDoubleArray</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an array containing all the instance attribute values</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>Returns the description of one instance in sparse format. 
 If the instance doesn't have access to a dataset, it returns the 
 internal floating-point values. Quotes string values that contain 
 whitespace characters.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#toString()">toString</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the instance's description as a string</DL>
</DD>
</DL>
<HR>

<A NAME="value(int)"><!-- --></A><H3>
value</H3>
<PRE>
public double <B>value</B>(int&nbsp;attIndex)</PRE>
<DL>
<DD>Returns an instance's attribute value in internal format.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#value(int)">value</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attIndex</CODE> - the attribute's index
<DT><B>Returns:</B><DD>the specified value as a double (If the corresponding
 attribute is nominal (or a string) then it returns the value's index as a 
 double).</DL>
</DD>
</DL>
<HR>

<A NAME="main(java.lang.String[])"><!-- --></A><H3>
main</H3>
<PRE>
public static void <B>main</B>(java.lang.String[]&nbsp;options)</PRE>
<DL>
<DD>Main method for testing this class.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getRevision()"><!-- --></A><H3>
getRevision</H3>
<PRE>
public java.lang.String <B>getRevision</B>()</PRE>
<DL>
<DD>Returns the revision string.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/core/RevisionHandler.html#getRevision()">getRevision</A></CODE> in interface <CODE><A HREF="../../weka/core/RevisionHandler.html" title="interface in weka.core">RevisionHandler</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../weka/core/Instance.html#getRevision()">getRevision</A></CODE> in class <CODE><A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the revision</DL>
</DD>
</DL>
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