jdistlib.math.approx

Class ApproximationFunction

java.lang.Object

jdistlib.math.approx.ApproximationFunction

All Implemented Interfaces:

UnivariateFunction

public class ApproximationFunction
extends java.lang.Object
implements UnivariateFunction

Create an approximation function. This is pretty much like R's approxfun. I'm emulating it here. I don't deal with NaN and Infinity. I don't do sanity check and no uniqueness check here. So, watch out.

Constructor Summary

Constructors

Constructor and Description
ApproximationFunction(ApproximationType t, double[] x, double[] y, double lo, double hi, double compromise)

Method Summary

Modifier and Type	Method and Description
static double	constant(double v, double[] x, double[] y, double lo, double hi, double compromise) Constant approximation
double	eval(double x)
static double	linear(double v, double[] x, double[] y, double lo, double hi) Linear approximation
void	setObjects(java.lang.Object... obj)
void	setParameters(double... params)

Methods inherited from class java.lang.Object

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

Constructor Detail

ApproximationFunction

public ApproximationFunction(ApproximationType t,
                             double[] x,
                             double[] y,
                             double lo,
                             double hi,
                             double compromise)

Method Detail

eval

public double eval(double x)

Specified by:

eval in interface UnivariateFunction

setParameters

public void setParameters(double... params)

Specified by:

setParameters in interface UnivariateFunction

setObjects

public void setObjects(java.lang.Object... obj)

Specified by:

setObjects in interface UnivariateFunction

linear

public static final double linear(double v,
                                  double[] x,
                                  double[] y,
                                  double lo,
                                  double hi)

Linear approximation

Parameters:

v -

x -

y -

lo -

hi -

Returns:

Approximated value

constant

public static final double constant(double v,
                                    double[] x,
                                    double[] y,
                                    double lo,
                                    double hi,
                                    double compromise)

Constant approximation

Parameters:

v -

x -

y -

lo -

hi -

compromise -

Returns:

Approximated value