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<PRE>
public static double <B>missingValue</B>()</PRE>
<DL>
<DD>Returns the double that codes "missing".
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the double that codes "missing"</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>
</DL>
</DD>
<DD><DL>

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

<A NAME="numClasses()"><!-- --></A><H3>
numClasses</H3>
<PRE>
public int <B>numClasses</B>()</PRE>
<DL>
<DD>Returns the number of class labels.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the number of class labels as an integer if the 
 class attribute is nominal, 1 otherwise.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../weka/core/UnassignedDatasetException.html" title="class in weka.core">UnassignedDatasetException</A></CODE> - if instance doesn't have access to any
 dataset</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 present. Always the same as numAttributes().
<P>
<DD><DL>
</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>
</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="setClassMissing()"><!-- --></A><H3>
setClassMissing</H3>
<PRE>
public void <B>setClassMissing</B>()</PRE>
<DL>
<DD>Sets the class value of an instance to be "missing". A deep copy of
 the vector of attribute values is performed before the
 value is set to be missing.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../weka/core/UnassignedClassException.html" title="class in weka.core">UnassignedClassException</A></CODE> - if the class is not set
<DD><CODE><A HREF="../../weka/core/UnassignedDatasetException.html" title="class in weka.core">UnassignedDatasetException</A></CODE> - if the instance doesn't
 have access to a dataset</DL>
</DD>
</DL>
<HR>

<A NAME="setClassValue(double)"><!-- --></A><H3>
setClassValue</H3>
<PRE>
public void <B>setClassValue</B>(double&nbsp;value)</PRE>
<DL>
<DD>Sets the class value of an instance to the given value (internal
 floating-point format).  A deep copy of the vector of attribute
 values is performed before the value is set.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><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).
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../weka/core/UnassignedClassException.html" title="class in weka.core">UnassignedClassException</A></CODE> - if the class is not set
<DD><CODE>UnaddignedDatasetException</CODE> - if the instance doesn't
 have access to a dataset</DL>
</DD>
</DL>
<HR>

<A NAME="setClassValue(java.lang.String)"><!-- --></A><H3>
setClassValue</H3>
<PRE>
public final void <B>setClassValue</B>(java.lang.String&nbsp;value)</PRE>
<DL>
<DD>Sets the class value of an instance to the given value. A deep
 copy of the vector of attribute values is performed before the
 value is set.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the new class value (If the class
 is a string attribute and the value can't be found,
 the value is added to the attribute).
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../weka/core/UnassignedClassException.html" title="class in weka.core">UnassignedClassException</A></CODE> - if the class is not set
<DD><CODE><A HREF="../../weka/core/UnassignedDatasetException.html" title="class in weka.core">UnassignedDatasetException</A></CODE> - if the dataset is not set
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the attribute is not
 nominal or a string, or the value couldn't be found for a nominal
 attribute</DL>
</DD>
</DL>
<HR>

<A NAME="setDataset(weka.core.Instances)"><!-- --></A><H3>
setDataset</H3>
<PRE>
public final void <B>setDataset</B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;instances)</PRE>
<DL>
<DD>Sets the reference to the dataset. Does not check if the instance
 is compatible with the dataset. Note: the dataset does not know
 about this instance. If the structure of the dataset's header
 gets changed, this instance will not be adjusted automatically.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>instances</CODE> - the reference to the dataset</DL>
</DD>
</DL>
<HR>

<A NAME="setMissing(int)"><!-- --></A><H3>
setMissing</H3>
<PRE>
public final void <B>setMissing</B>(int&nbsp;attIndex)</PRE>
<DL>
<DD>Sets a specific value to be "missing". Performs a deep copy
 of the vector of attribute values before the value is set to
 be missing.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attIndex</CODE> - the attribute's index</DL>
</DD>
</DL>
<HR>

<A NAME="setMissing(weka.core.Attribute)"><!-- --></A><H3>
setMissing</H3>
<PRE>
public final void <B>setMissing</B>(<A HREF="../../weka/core/Attribute.html" title="class in weka.core">Attribute</A>&nbsp;att)</PRE>
<DL>
<DD>Sets a specific value to be "missing". Performs a deep copy
 of the vector of attribute values before the value is set to
 be missing. The given attribute has to belong to a dataset.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>att</CODE> - the attribute</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>
</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.
 Does exactly the same thing as setValue().
<P>
<DD><DL>
</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="setValue(int, java.lang.String)"><!-- --></A><H3>
setValue</H3>
<PRE>
public final void <B>setValue</B>(int&nbsp;attIndex,
                           java.lang.String&nbsp;value)</PRE>
<DL>
<DD>Sets a value of a nominal or string attribute to the given
 value. Performs a deep copy of the vector of attribute values
 before the value is set.
<P>
<DD><DL>
</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 attribute
 is a string attribute and the value can't be found,
 the value is added to the attribute).
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../weka/core/UnassignedDatasetException.html" title="class in weka.core">UnassignedDatasetException</A></CODE> - if the dataset is not set
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the selected
 attribute is not nominal or a string, or the supplied value couldn't 
 be found for a nominal attribute</DL>
</DD>
</DL>
<HR>

<A NAME="setValue(weka.core.Attribute, double)"><!-- --></A><H3>
setValue</H3>
<PRE>
public final void <B>setValue</B>(<A HREF="../../weka/core/Attribute.html" title="class in weka.core">Attribute</A>&nbsp;att,
                           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, so if you are
 planning on calling setValue many times it may be faster to
 create a new instance using toDoubleArray.  The given attribute
 has to belong to a dataset.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>att</CODE> - the attribute<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="setValue(weka.core.Attribute, java.lang.String)"><!-- --></A><H3>
setValue</H3>
<PRE>
public final void <B>setValue</B>(<A HREF="../../weka/core/Attribute.html" title="class in weka.core">Attribute</A>&nbsp;att,
                           java.lang.String&nbsp;value)</PRE>
<DL>
<DD>Sets a value of an nominal or string attribute to the given
 value. Performs a deep copy of the vector of attribute values
 before the value is set, so if you are planning on calling setValue many
 times it may be faster to create a new instance using toDoubleArray.
 The given attribute has to belong to a dataset.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>att</CODE> - the attribute<DD><CODE>value</CODE> - the new attribute value (If the attribute
 is a string attribute and the value can't be found,
 the value is added to the attribute).
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the the attribute is not
 nominal or a string, or the value couldn't be found for a nominal
 attribute</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.
<P>
<DD><DL>
</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>