Package pulse.math

Class FunctionWithInterpolation

java.lang.Object

pulse.math.FunctionWithInterpolation

All Implemented Interfaces:

Serializable

public abstract class FunctionWithInterpolation
extends Object
implements Serializable

An abstract class for univariate functions with the capacity of spline interpolation.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	NUM_PARTITIONS

Constructor Summary

Constructors

Constructor	Description
FunctionWithInterpolation(Segment parameterBounds)	Creates a FunctionWithInterpolation using the parameterBounds and a default number of points 8192.
FunctionWithInterpolation(Segment parameterBounds, int lookupTableSize)	Constructs a FunctionWithInterpolation by tabulating the function values within the parameterBounds at discrete nodes, the number of which is given by the second argument.

Method Summary

Modifier and Type	Method	Description
abstract double	evaluate(double t)	Performs the calculation at t.
Segment	getParameterBounds()	Retrieves the parameter bounds.
void	setParameterBounds(Segment parameterBounds)	Sets the parameter bounds to parameterBounds.
double	valueAt(double t)	Uses the stored interpolation function to calculate values at any t within the parameter bounds.

Methods inherited from class java.lang.Object

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

Field Detail

NUM_PARTITIONS

public static final int NUM_PARTITIONS

See Also:

Constant Field Values

Constructor Detail

FunctionWithInterpolation

public FunctionWithInterpolation(Segment parameterBounds,
                                 int lookupTableSize)

Constructs a FunctionWithInterpolation by tabulating the function values within the parameterBounds at discrete nodes, the number of which is given by the second argument. After having done this, creates a SplineInterpolation, which can be invoked in future to calculate intermediate function values without loss of accuracy.

Parameters:

parameterBounds - the calculation bounds.

lookupTableSize - a size of the table for discrete function calculations.

FunctionWithInterpolation

public FunctionWithInterpolation(Segment parameterBounds)

Creates a FunctionWithInterpolation using the parameterBounds and a default number of points 8192.

Parameters:

parameterBounds - the calculation bounds.

Method Detail

evaluate

public abstract double evaluate(double t)

Performs the calculation at t.

Parameters:

t - the value of the independent variable

Returns:

the function value at t

valueAt

public double valueAt(double t)

Uses the stored interpolation function to calculate values at any t within the parameter bounds. Note: If t is not contained within the parameter bounds, the method will return 0.0.

Parameters:

t - the value of the independent variable

Returns:

will return the interpolated value or 0.0

getParameterBounds

public Segment getParameterBounds()

Retrieves the parameter bounds.

Returns:

the parameter bounds.

setParameterBounds

public void setParameterBounds(Segment parameterBounds)

Sets the parameter bounds to parameterBounds. The interpolation will then be re-calculated.

Parameters:

parameterBounds - the new parameter bounds.