com.rapidminer.tools.math
Class SpectrumFilter

java.lang.Object
  com.rapidminer.tools.math.SpectrumFilter

public class SpectrumFilter
extends java.lang.Object

Creates a series of peaks (a spectrum) from the series of complex values calculated for example by a fourier transform. Since the FT input values must not be equivalent the magnitudes of the spectrum do not correspond to the real amplitudes. Like the human ear this filter tries to calculate more accurate values (see ERB or Bark filters).

Author:

Ingo Mierswa

Field Summary

static int	ERB
static int	LOG
static int	LOG2
static int	NONE

Constructor Summary

SpectrumFilter(int weightType)

Method Summary

Peak[]

filter(Complex[] spectrum, int totalSize)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NONE

public static final int NONE

See Also:

Constant Field Values

ERB

public static final int ERB

See Also:

Constant Field Values

LOG

public static final int LOG

See Also:

Constant Field Values

LOG2

public static final int LOG2

See Also:

Constant Field Values

Constructor Detail

SpectrumFilter

public SpectrumFilter(int weightType)

Method Detail

filter

public Peak[] filter(Complex[] spectrum,
                     int totalSize)