fastfouriertransform.html

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Calculates the greatest power of 2 which is smaller than the given
 number.</TD>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="TIME2FREQUENCY"><!-- --></A><H3>
TIME2FREQUENCY</H3>
<PRE>
public static final int <B>TIME2FREQUENCY</B></PRE>
<DL>
<DD>Specifies the transformation from time into frequency domain.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#com.rapidminer.tools.math.FastFourierTransform.TIME2FREQUENCY">Constant Field Values</A></DL>
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<A NAME="FREQUENCY2TIME"><!-- --></A><H3>
FREQUENCY2TIME</H3>
<PRE>
public static final int <B>FREQUENCY2TIME</B></PRE>
<DL>
<DD>Specifies the transformation from frequency into time domain.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#com.rapidminer.tools.math.FastFourierTransform.FREQUENCY2TIME">Constant Field Values</A></DL>
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<A NAME="FastFourierTransform(int)"><!-- --></A><H3>
FastFourierTransform</H3>
<PRE>
public <B>FastFourierTransform</B>(int&nbsp;windowFunctionType)</PRE>
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<A NAME="getFourierTransform(com.rapidminer.example.ExampleSet, com.rapidminer.example.Attribute, com.rapidminer.example.Attribute)"><!-- --></A><H3>
getFourierTransform</H3>
<PRE>
public <A HREF="../../../../com/rapidminer/tools/math/Complex.html" title="class in com.rapidminer.tools.math">Complex</A>[] <B>getFourierTransform</B>(<A HREF="../../../../com/rapidminer/example/ExampleSet.html" title="interface in com.rapidminer.example">ExampleSet</A>&nbsp;exampleSet,
                                     <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;source,
                                     <A HREF="../../../../com/rapidminer/example/Attribute.html" title="interface in com.rapidminer.example">Attribute</A>&nbsp;target)
                              throws <A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></PRE>
<DL>
<DD>Builds the fourier transform from the values of the first attribute onto
 the second.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="convertFrequency(double, int, int)"><!-- --></A><H3>
convertFrequency</H3>
<PRE>
public static double <B>convertFrequency</B>(double&nbsp;frequency,
                                      int&nbsp;nyquist,
                                      int&nbsp;totalLength)</PRE>
<DL>
<DD>Normalizes the frequency to the correct value.
<P>
<DD><DL>
</DL>
</DD>
</DL>
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<A NAME="getFourierTransform(com.rapidminer.tools.math.Complex[], int, int)"><!-- --></A><H3>
getFourierTransform</H3>
<PRE>
public <A HREF="../../../../com/rapidminer/tools/math/Complex.html" title="class in com.rapidminer.tools.math">Complex</A>[] <B>getFourierTransform</B>(<A HREF="../../../../com/rapidminer/tools/math/Complex.html" title="class in com.rapidminer.tools.math">Complex</A>[]&nbsp;series,
                                     int&nbsp;direction,
                                     int&nbsp;functionType)
                              throws <A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></PRE>
<DL>
<DD>Performs a fourier transformation in the specified direction. The window
 function type defines one of the possible window functions.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../com/rapidminer/operator/OperatorException.html" title="class in com.rapidminer.operator">OperatorException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getGreatestPowerOf2LessThan(int)"><!-- --></A><H3>
getGreatestPowerOf2LessThan</H3>
<PRE>
public static int <B>getGreatestPowerOf2LessThan</B>(int&nbsp;n)</PRE>
<DL>
<DD>Calculates the greatest power of 2 which is smaller than the given
 number.
<P>
<DD><DL>
</DL>
</DD>
</DL>
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