instance.html

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<A NAME="attributeSparse(int)"><!-- --></A><H3>
attributeSparse</H3>
<PRE>
public <A HREF="../../weka/core/Attribute.html" title="class in weka.core">Attribute</A> <B>attributeSparse</B>(int&nbsp;indexOfIndex)</PRE>
<DL>
<DD>Returns the attribute with the given index. Does the same
 thing as attribute().
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>indexOfIndex</CODE> - the index of the attribute's index
<DT><B>Returns:</B><DD>the attribute at the given position
<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 a
 dataset</DL>
</DD>
</DL>
<HR>

<A NAME="classAttribute()"><!-- --></A><H3>
classAttribute</H3>
<PRE>
public <A HREF="../../weka/core/Attribute.html" title="class in weka.core">Attribute</A> <B>classAttribute</B>()</PRE>
<DL>
<DD>Returns class attribute.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

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

<A NAME="classIndex()"><!-- --></A><H3>
classIndex</H3>
<PRE>
public int <B>classIndex</B>()</PRE>
<DL>
<DD>Returns the class attribute's index.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the class index as an integer
<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 a dataset</DL>
</DD>
</DL>
<HR>

<A NAME="classIsMissing()"><!-- --></A><H3>
classIsMissing</H3>
<PRE>
public boolean <B>classIsMissing</B>()</PRE>
<DL>
<DD>Tests if an instance's class is missing.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if the instance's class is missing
<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 or the instance doesn't
 have access to a dataset</DL>
</DD>
</DL>
<HR>

<A NAME="classValue()"><!-- --></A><H3>
classValue</H3>
<PRE>
public double <B>classValue</B>()</PRE>
<DL>
<DD>Returns an instance's class value in internal format. (ie. as a
 floating-point number)
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the corresponding value as a double (If the 
 corresponding attribute is nominal (or a string) then it returns the 
 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 or the instance doesn't
 have access to a dataset</DL>
</DD>
</DL>
<HR>

<A NAME="copy()"><!-- --></A><H3>
copy</H3>
<PRE>
public java.lang.Object <B>copy</B>()</PRE>
<DL>
<DD>Produces a shallow copy of this instance. The copy has
 access to the same dataset. (if you want to make a copy
 that doesn't have access to the dataset, use 
 <code>new Instance(instance)</code>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../weka/core/Copyable.html#copy()">copy</A></CODE> in interface <CODE><A HREF="../../weka/core/Copyable.html" title="interface in weka.core">Copyable</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the shallow copy</DL>
</DD>
</DL>
<HR>

<A NAME="dataset()"><!-- --></A><H3>
dataset</H3>
<PRE>
public <A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>dataset</B>()</PRE>
<DL>
<DD>Returns the dataset this instance has access to. (ie. obtains
 information about attribute types from) Null if the instance
 doesn't have access to a dataset.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the dataset the instance has accesss to</DL>
</DD>
</DL>
<HR>

<A NAME="deleteAttributeAt(int)"><!-- --></A><H3>
deleteAttributeAt</H3>
<PRE>
public void <B>deleteAttributeAt</B>(int&nbsp;position)</PRE>
<DL>
<DD>Deletes an attribute at the given position (0 to 
 numAttributes() - 1). Only succeeds if the instance does not
 have access to any dataset because otherwise inconsistencies
 could be introduced.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>position</CODE> - the attribute's position
<DT><B>Throws:</B>
<DD><CODE>java.lang.RuntimeException</CODE> - if the instance has access to a
 dataset</DL>
</DD>
</DL>
<HR>

<A NAME="enumerateAttributes()"><!-- --></A><H3>
enumerateAttributes</H3>
<PRE>
public java.util.Enumeration <B>enumerateAttributes</B>()</PRE>
<DL>
<DD>Returns an enumeration of all the attributes.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>enumeration of all the attributes
<DT><B>Throws:</B>
<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="equalHeaders(weka.core.Instance)"><!-- --></A><H3>
equalHeaders</H3>
<PRE>
public boolean <B>equalHeaders</B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;inst)</PRE>
<DL>
<DD>Tests if the headers of two instances are equivalent.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>inst</CODE> - another instance
<DT><B>Returns:</B><DD>true if the header of the given instance is 
 equivalent to this instance's header
<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="hasMissingValue()"><!-- --></A><H3>
hasMissingValue</H3>
<PRE>
public boolean <B>hasMissingValue</B>()</PRE>
<DL>
<DD>Tests whether an instance has a missing value. Skips the class attribute if set.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if instance has a missing value.
<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="index(int)"><!-- --></A><H3>
index</H3>
<PRE>
public int <B>index</B>(int&nbsp;position)</PRE>
<DL>
<DD>Returns the index of the attribute stored at the given position.
 Just returns the given value.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>position</CODE> - the position
<DT><B>Returns:</B><DD>the index of the attribute stored at the given position</DL>
</DD>
</DL>
<HR>

<A NAME="insertAttributeAt(int)"><!-- --></A><H3>
insertAttributeAt</H3>
<PRE>
public void <B>insertAttributeAt</B>(int&nbsp;position)</PRE>
<DL>
<DD>Inserts an attribute at the given position (0 to 
 numAttributes()). Only succeeds if the instance does not
 have access to any dataset because otherwise inconsistencies
 could be introduced.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>position</CODE> - the attribute's position
<DT><B>Throws:</B>
<DD><CODE>java.lang.RuntimeException</CODE> - if the instance has accesss to a
 dataset
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the position is out of range</DL>
</DD>
</DL>
<HR>

<A NAME="isMissing(int)"><!-- --></A><H3>
isMissing</H3>
<PRE>
public boolean <B>isMissing</B>(int&nbsp;attIndex)</PRE>
<DL>
<DD>Tests if a specific value is "missing".
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attIndex</CODE> - the attribute's index
<DT><B>Returns:</B><DD>true if the value is "missing"</DL>
</DD>
</DL>
<HR>

<A NAME="isMissingSparse(int)"><!-- --></A><H3>
isMissingSparse</H3>
<PRE>
public boolean <B>isMissingSparse</B>(int&nbsp;indexOfIndex)</PRE>
<DL>
<DD>Tests if a specific value is "missing". Does
 the same thing as isMissing() if applied to an Instance.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>indexOfIndex</CODE> - the index of the attribute's index
<DT><B>Returns:</B><DD>true if the value is "missing"</DL>
</DD>
</DL>
<HR>

<A NAME="isMissing(weka.core.Attribute)"><!-- --></A><H3>
isMissing</H3>
<PRE>
public boolean <B>isMissing</B>(<A HREF="../../weka/core/Attribute.html" title="class in weka.core">Attribute</A>&nbsp;att)</PRE>
<DL>
<DD>Tests if a specific value is "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
<DT><B>Returns:</B><DD>true if the value is "missing"</DL>
</DD>
</DL>
<HR>

<A NAME="isMissingValue(double)"><!-- --></A><H3>
isMissingValue</H3>
<PRE>
public static boolean <B>isMissingValue</B>(double&nbsp;val)</PRE>
<DL>
<DD>Tests if the given value codes "missing".
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>val</CODE> - the value to be tested
<DT><B>Returns:</B><DD>true if val codes "missing"</DL>
</DD>
</DL>
<HR>

<A NAME="mergeInstance(weka.core.Instance)"><!-- --></A><H3>
mergeInstance</H3>
<PRE>
public <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> <B>mergeInstance</B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;inst)</PRE>
<DL>
<DD>Merges this instance with the given instance and returns
 the result. Dataset is set to null.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>inst</CODE> - the instance to be merged with this one
<DT><B>Returns:</B><DD>the merged instances</DL>
</DD>
</DL>
<HR>

<A NAME="missingValue()"><!-- --></A><H3>
missingValue</H3>