instance.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

<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.<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">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.<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.<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().<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.<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">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">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.<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">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.<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="setWeight(double)"><!-- --></A><H3>
setWeight</H3>
<PRE>
public final void <B>setWeight</B>(double&nbsp;weight)</PRE>
<DL>
<DD>Sets the weight of an instance.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>weight</CODE> - the weight</DL>
</DD>
</DL>
<HR>

<A NAME="stringValue(int)"><!-- --></A><H3>
stringValue</H3>
<PRE>
public final java.lang.String <B>stringValue</B>(int&nbsp;attIndex)</PRE>
<DL>
<DD>Returns the value of a nominal (or string) attribute
 for the instance.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attIndex</CODE> - the attribute's index<DT><B>Returns:</B><DD>the value as a string<DT><B>Throws:</B><DD><CODE>java.lang.IllegalArgumentException</CODE> - if the attribute is not a nominal
 (or string) attribute.<DD><CODE><A HREF="../../weka/core/UnassignedDatasetException.html">UnassignedDatasetException</A></CODE> - if the instance doesn't belong
 to a dataset.</DL>
</DD>
</DL>
<HR>

<A NAME="stringValue(weka.core.Attribute)"><!-- --></A><H3>
stringValue</H3>
<PRE>
public final java.lang.String <B>stringValue</B>(<A HREF="../../weka/core/Attribute.html">Attribute</A>&nbsp;att)</PRE>
<DL>
<DD>Returns the value of a nominal (or string) attribute
 for the instance.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>att</CODE> - the attribute<DT><B>Returns:</B><DD>the value as a string<DT><B>Throws:</B><DD><CODE>java.lang.IllegalArgumentException</CODE> - if the attribute is not a nominal
 (or string) attribute.<DD><CODE><A HREF="../../weka/core/UnassignedDatasetException.html">UnassignedDatasetException</A></CODE> - if the instance doesn't belong
 to a dataset.</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.<DD><DL>
</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. If the instance
 doesn't have access to a dataset, it returns the internal
 floating-point values. Quotes string
 values that contain whitespace characters.<DD><DL>
<DT><B>Overrides:</B><DD><CODE>toString</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the instance's description as a string</DL>
</DD>
</DL>
<HR>

<A NAME="toString(int)"><!-- --></A><H3>
toString</H3>
<PRE>
public final java.lang.String <B>toString</B>(int&nbsp;attIndex)</PRE>
<DL>
<DD>Returns the description of one value of the instance as a 
 string. If the instance doesn't have access to a dataset, it 
 returns the internal floating-point value. Quotes string
 values that contain whitespace characters, or if they
 are a question mark.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attIndex</CODE> - the attribute's index<DT><B>Returns:</B><DD>the value's description as a string</DL>
</DD>
</DL>
<HR>

<A NAME="toString(weka.core.Attribute)"><!-- --></A><H3>
toString</H3>
<PRE>
public final java.lang.String <B>toString</B>(<A HREF="../../weka/core/Attribute.html">Attribute</A>&nbsp;att)</PRE>
<DL>
<DD>Returns the description of one value of the instance as a 
 string. If the instance doesn't have access to a dataset it 
 returns the internal floating-point value. Quotes string
 values that contain whitespace characters, or if they
 are a question mark.
 The given attribute has to belong to a dataset.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>att</CODE> - the attribute<DT><B>Returns:</B><DD>the value'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.<DD><DL>
</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="valueSparse(int)"><!-- --></A><H3>
valueSparse</H3>
<PRE>
public double <B>valueSparse</B>(int&nbsp;indexOfIndex)</PRE>
<DL>
<DD>Returns an instance's attribute value in internal format.
 Does exactly the same thing as value() if applied to an Instance.<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 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="value(weka.core.Attribute)"><!-- --></A><H3>
value</H3>
<PRE>
public double <B>value</B>(<A HREF="../../weka/core/Attribute.html">Attribute</A>&nbsp;att)</PRE>
<DL>
<DD>Returns an instance's attribute value in internal format.
 The given attribute has to belong to a dataset.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>att</CODE> - the attribute<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="weight()"><!-- --></A><H3>
weight</H3>
<PRE>
public final double <B>weight</B>()</PRE>
<DL>
<DD>Returns the instance's weight.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the instance's weight 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.<DD><DL>
</DL>
</DD>
</DL>
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