principalcomponents.html

数据挖掘的最常用工具。由于开源

<TD><CODE><B><A HREF="../../../../weka/filters/unsupervised/attribute/PrincipalComponents.html#setInputFormat(weka.core.Instances)">setInputFormat</A></B>(<A HREF="../../../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;instanceInfo)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the format of the input instances.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../weka/filters/unsupervised/attribute/PrincipalComponents.html#setMaximumAttributeNames(int)">setMaximumAttributeNames</A></B>(int&nbsp;value)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets maximum number of attributes to include in
 transformed attribute names.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../weka/filters/unsupervised/attribute/PrincipalComponents.html#setMaximumAttributes(int)">setMaximumAttributes</A></B>(int&nbsp;value)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets maximum number of PC attributes to retain.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../weka/filters/unsupervised/attribute/PrincipalComponents.html#setNormalize(boolean)">setNormalize</A></B>(boolean&nbsp;value)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set whether input data will be normalized.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../weka/filters/unsupervised/attribute/PrincipalComponents.html#setOptions(java.lang.String[])">setOptions</A></B>(java.lang.String[]&nbsp;options)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Parses a list of options for this object.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../weka/filters/unsupervised/attribute/PrincipalComponents.html#setVarianceCovered(double)">setVarianceCovered</A></B>(double&nbsp;value)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the amount of variance to account for when retaining
 principal components.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../weka/filters/unsupervised/attribute/PrincipalComponents.html#varianceCoveredTipText()">varianceCoveredTipText</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the tip text for this property.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_weka.filters.Filter"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class weka.filters.<A HREF="../../../../weka/filters/Filter.html" title="class in weka.filters">Filter</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../weka/filters/Filter.html#batchFilterFile(weka.filters.Filter, java.lang.String[])">batchFilterFile</A>, <A HREF="../../../../weka/filters/Filter.html#filterFile(weka.filters.Filter, java.lang.String[])">filterFile</A>, <A HREF="../../../../weka/filters/Filter.html#getCapabilities(weka.core.Instances)">getCapabilities</A>, <A HREF="../../../../weka/filters/Filter.html#getOutputFormat()">getOutputFormat</A>, <A HREF="../../../../weka/filters/Filter.html#isFirstBatchDone()">isFirstBatchDone</A>, <A HREF="../../../../weka/filters/Filter.html#isNewBatch()">isNewBatch</A>, <A HREF="../../../../weka/filters/Filter.html#isOutputFormatDefined()">isOutputFormatDefined</A>, <A HREF="../../../../weka/filters/Filter.html#makeCopies(weka.filters.Filter, int)">makeCopies</A>, <A HREF="../../../../weka/filters/Filter.html#makeCopy(weka.filters.Filter)">makeCopy</A>, <A HREF="../../../../weka/filters/Filter.html#numPendingOutput()">numPendingOutput</A>, <A HREF="../../../../weka/filters/Filter.html#output()">output</A>, <A HREF="../../../../weka/filters/Filter.html#outputPeek()">outputPeek</A>, <A HREF="../../../../weka/filters/Filter.html#toString()">toString</A>, <A HREF="../../../../weka/filters/Filter.html#useFilter(weka.core.Instances, weka.filters.Filter)">useFilter</A>, <A HREF="../../../../weka/filters/Filter.html#wekaStaticWrapper(weka.filters.Sourcable, java.lang.String, weka.core.Instances, weka.core.Instances)">wekaStaticWrapper</A></CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>equals, getClass, hashCode, notify, notifyAll, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>

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

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="globalInfo()"><!-- --></A><H3>
globalInfo</H3>
<PRE>
public java.lang.String <B>globalInfo</B>()</PRE>
<DL>
<DD>Returns a string describing this filter.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a description of the filter suitable for
                        displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="listOptions()"><!-- --></A><H3>
listOptions</H3>
<PRE>
public java.util.Enumeration <B>listOptions</B>()</PRE>
<DL>
<DD>Returns an enumeration describing the available options.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/core/OptionHandler.html#listOptions()">listOptions</A></CODE> in interface <CODE><A HREF="../../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an enumeration of all the available options.</DL>
</DD>
</DL>
<HR>

<A NAME="setOptions(java.lang.String[])"><!-- --></A><H3>
setOptions</H3>
<PRE>
public void <B>setOptions</B>(java.lang.String[]&nbsp;options)
                throws java.lang.Exception</PRE>
<DL>
<DD>Parses a list of options for this object. <p/>

   <!-- options-start -->
 Valid options are: <p/>
 
 <pre> -D
  Don't normalize input data.</pre>
 
 <pre> -R &lt;num&gt;
  Retain enough PC attributes to account
  for this proportion of variance in the original data.
  (default: 0.95)</pre>
 
 <pre> -A &lt;num&gt;
  Maximum number of attributes to include in 
  transformed attribute names.
  (-1 = include all, default: 5)</pre>
 
 <pre> -M &lt;num&gt;
  Maximum number of PC attributes to retain.
  (-1 = include all, default: -1)</pre>
 
   <!-- options-end -->
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/core/OptionHandler.html#setOptions(java.lang.String[])">setOptions</A></CODE> in interface <CODE><A HREF="../../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>options</CODE> - the list of options as an array of strings
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an option is not supported</DL>
</DD>
</DL>
<HR>

<A NAME="getOptions()"><!-- --></A><H3>
getOptions</H3>
<PRE>
public java.lang.String[] <B>getOptions</B>()</PRE>
<DL>
<DD>Gets the current settings of the filter.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../weka/core/OptionHandler.html#getOptions()">getOptions</A></CODE> in interface <CODE><A HREF="../../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an array of strings suitable for passing to setOptions</DL>
</DD>
</DL>
<HR>

<A NAME="normalizeTipText()"><!-- --></A><H3>
normalizeTipText</H3>
<PRE>
public java.lang.String <B>normalizeTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>tip text for this property suitable for
                        displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="setNormalize(boolean)"><!-- --></A><H3>
setNormalize</H3>
<PRE>
public void <B>setNormalize</B>(boolean&nbsp;value)</PRE>
<DL>
<DD>Set whether input data will be normalized.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - true if input data is to be normalized</DL>
</DD>
</DL>
<HR>

<A NAME="getNormalize()"><!-- --></A><H3>
getNormalize</H3>
<PRE>
public boolean <B>getNormalize</B>()</PRE>
<DL>
<DD>Gets whether or not input data is to be normalized.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if input data is to be normalized</DL>
</DD>
</DL>
<HR>

<A NAME="varianceCoveredTipText()"><!-- --></A><H3>
varianceCoveredTipText</H3>
<PRE>
public java.lang.String <B>varianceCoveredTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>tip text for this property suitable for
                        displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="setVarianceCovered(double)"><!-- --></A><H3>
setVarianceCovered</H3>
<PRE>
public void <B>setVarianceCovered</B>(double&nbsp;value)</PRE>
<DL>
<DD>Sets the amount of variance to account for when retaining
 principal components.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the proportion of total variance to account for</DL>
</DD>
</DL>
<HR>

<A NAME="getVarianceCovered()"><!-- --></A><H3>
getVarianceCovered</H3>
<PRE>
public double <B>getVarianceCovered</B>()</PRE>
<DL>
<DD>Gets the proportion of total variance to account for when
 retaining principal components.
<P>
<DD><DL>
</DL>