org.jscience.mathematics.function

Class DiscreteFunction<X,Y>

java.lang.Object

org.jscience.mathematics.function.Function<X,Y>

org.jscience.mathematics.function.DiscreteFunction<X,Y>

All Implemented Interfaces:

Serializable, javolution.lang.Realtime

public final class DiscreteFunction<X,Y>
extends Function<X,Y>

This class represents a function defined from a mapping betweem two sets (points and values).

Instance of this class can be used to approximate continuous functions or to numerically solve differential systems.

Version:

3.0, February 13, 2006

Author:

Jean-Marie Dautelle

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DiscreteFunction(SortedMap<X,Y> pointValues, Interpolator<X,Y> interpolator, Variable<X> variable) Creates the discrete function for the specified point-value entries.

Method Summary

Modifier and Type	Method and Description
Y	evaluate() Evaluates this function using its variables current values.
Interpolator<X,Y>	getInterpolator() Returns the interpolator used by this discrete function.
SortedMap<X,Y>	getPointValues() Returns the point-value entries of this discrete function.
List<Variable<X>>	getVariables() Returns a lexically ordered list of the variables (or arguments) for this function (empty list for constant functions).
javolution.text.Text	toText() Returns the textual representation of this real-time object (equivalent to toString except that the returned value can be allocated from the local context space).

Methods inherited from class org.jscience.mathematics.function.Function

compose, differentiate, divide, equals, evaluate, evaluate, getVariable, hashCode, integrate, minus, plus, pow, times, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DiscreteFunction

public DiscreteFunction(SortedMap<X,Y> pointValues,
                        Interpolator<X,Y> interpolator,
                        Variable<X> variable)

Creates the discrete function for the specified point-value entries.

Parameters:

pointValues - the point-value entries of this function.

interpolator - the interpolator.

variable - this function variable.

Method Detail

getPointValues

public SortedMap<X,Y> getPointValues()

Returns the point-value entries of this discrete function.

Returns:

the point-value mapping.

getInterpolator

public Interpolator<X,Y> getInterpolator()

Returns the interpolator used by this discrete function.

Returns:

the interpolator used to estimate the value between two points.

evaluate

public Y evaluate()

Description copied from class: Function

Evaluates this function using its variables current values.

Specified by:

evaluate in class Function<X,Y>

Returns:

the evaluation of this function.

getVariables

public List<Variable<X>> getVariables()

Description copied from class: Function

Returns a lexically ordered list of the variables (or arguments) for this function (empty list for constant functions).

Specified by:

getVariables in class Function<X,Y>

Returns:

this function current unset variables (sorted).

toText

public javolution.text.Text toText()

Description copied from class: Function

Returns the textual representation of this real-time object (equivalent to toString except that the returned value can be allocated from the local context space).

Specified by:

toText in interface javolution.lang.Realtime

Specified by:

toText in class Function<X,Y>

Returns:

this object's textual representation.