Package PamUtils

Class PamInterp

java.lang.Object

PamUtils.PamInterp

public class PamInterp
extends Object

Static classes to perform interpolation tasks

Original functions from:

Linear interpolation: http://www.java2s.com/Code/Java/Collections-Data-Structure/LinearInterpolation.htm

Author:

Jamie Macaulay

Constructor Summary

Constructors

Constructor	Description
PamInterp()

Method Summary

Modifier and Type	Method	Description
static final double[]	interpLinear(double[] x, double[] y, double[] xi)	Linear interpolation
static final double[]	interpLinear(long[] x, double[] y, long[] xi)	Linear interpolation
static final BigDecimal[]	interpLinear(BigDecimal[] x, BigDecimal[] y, BigDecimal[] xi)	Linear interpolation
static final double[]	interpWaveform(double[] waveform, double ratio)	Interpolate a waveform in the frequency domain in order to preserve frequency content and prevent introduction of high frequency artifacts.

Methods inherited from class java.lang.Object

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

Constructor Details

PamInterp

public PamInterp()

Method Details

interpLinear

public static final double[] interpLinear(double[] x,
 double[] y,
 double[] xi)
                                   throws IllegalArgumentException

Linear interpolation

Parameters:

x - - the original x value array

y - - the original y value array

xi - - new x values to find y for.

Returns:

Throws:

IllegalArgumentException

interpLinear

public static final BigDecimal[] interpLinear(BigDecimal[] x,
 BigDecimal[] y,
 BigDecimal[] xi)

Linear interpolation

Parameters:

x - - the original x value array

y - - the original y value array

xi - - new x values to find y for.

Returns:

Throws:

IllegalArgumentException

interpLinear

public static final double[] interpLinear(long[] x,
 double[] y,
 long[] xi)
                                   throws IllegalArgumentException

Linear interpolation

Parameters:

x - - the original x value array

y - - the original y value array

xi - - new x values to find y for.

Returns:

Throws:

IllegalArgumentException

interpWaveform

public static final double[] interpWaveform(double[] waveform,
 double ratio)

Interpolate a waveform in the frequency domain in order to preserve frequency content and prevent introduction of high frequency artifacts.

Parameters:

waveform - - the waveform to interpolate.

ratio - - the new waveform sample rate ration. For example to up sample from 192kHz to 288kHz then ratio=288/192.

Returns:

the interpolated waveform.