com.numericalmethod.suanshu.analysis.function.rn2r1
Class UnivariateRealFunction

java.lang.Object
  com.numericalmethod.suanshu.analysis.function.rn2r1.UnivariateRealFunction

All Implemented Interfaces:

Function, RealScalarFunction

Direct Known Subclasses:

BetaRegularized, BetaRegularizedInverse, ContinuedFraction, CumulativeNormal, CumulativeNormalInverse, DBetaRegularized, DErf, Dfdx, DGamma, DGaussian, Digamma, Erf, Erfc, ErfInverse, FiltrationFunction, FiniteDifference, Gamma, Gaussian, LogGamma, NevilleTable, Polynomial

public abstract class UnivariateRealFunction
extends java.lang.Object
implements RealScalarFunction

This abstract class represents a univariate real function. It takes one real argument and outputs one real value.

That is,

 y = f(x)
 

Nested Class Summary

Nested classes/interfaces inherited from interface com.numericalmethod.suanshu.analysis.function.Function

Function.EvaluationException

Constructor Summary

UnivariateRealFunction()

Method Summary

int	dimension4Domain() Get the number of variables of the function.
int	dimension4Range() Get the dimension of the range space the function.
double	evaluate(double... args) A real function, f, takes a double array double[], {x0, x1, ..., xn} and maps it to a double, f(x0, x1, ..., xn)
abstract double	evaluate(double x) Compute f(x).

Methods inherited from class java.lang.Object

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

Constructor Detail

UnivariateRealFunction

public UnivariateRealFunction()

Method Detail

dimension4Domain

public int dimension4Domain()

Description copied from interface: Function

Get the number of variables of the function.

For example, for a univariate function, the domain dimension is 1. For a bivariate function, the domain dimension is 2.

Specified by:

dimension4Domain in interface Function

Returns:

the number of variables

dimension4Range

public int dimension4Range()

Description copied from interface: Function

Get the dimension of the range space the function.

For example, for a Rn->Rm function, the dimension of the range is m.

Specified by:

dimension4Range in interface Function

Returns:

the dimension of the range

evaluate

public double evaluate(double... args)

Description copied from interface: RealScalarFunction

A real function, f, takes a double array double[],

{x0, x1, ..., xn}

and maps it to a double,

f(x0, x1, ..., xn)

Specified by:

evaluate in interface RealScalarFunction

Parameters:

args - {x} = {x0, x1, ... xn}

Returns:

f({x}) as output

evaluate

public abstract double evaluate(double x)

Compute f(x).

Parameters:

x - x

Returns:

f(x)