visad

Class FunctionImpl

java.lang.Object

visad.ThingImpl

visad.DataImpl

visad.FunctionImpl

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Data, Function, Thing

Direct Known Subclasses:

FieldImpl

public abstract class FunctionImpl
extends DataImpl
implements Function

FunctionImpl is the abstract superclass for approximate implmentations of mathematical functions. It inherits the Function interface.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class visad.DataImpl

DataImpl.Syncher

Field Summary

Fields inherited from interface visad.Data

ABS, ACOS, ACOS_DEGREES, ADD, ASIN, ASIN_DEGREES, ATAN, ATAN_DEGREES, ATAN2, ATAN2_DEGREES, CEIL, COS, COS_DEGREES, DEGREES_TO_RADIANS, DEPENDENT, DIVIDE, EXP, FLOOR, INDEPENDENT, INV_ATAN2, INV_ATAN2_DEGREES, INV_DIVIDE, INV_POW, INV_REMAINDER, INV_SUBTRACT, LOG, MAX, MIN, MULTIPLY, NEAREST_NEIGHBOR, NEGATE, NO_ERRORS, NOP, POW, RADIANS_TO_DEGREES, REMAINDER, RINT, ROUND, SIN, SIN_DEGREES, SQRT, SUBTRACT, TAN, TAN_DEGREES, WEIGHTED_AVERAGE

Constructor Summary

Constructors

Constructor and Description
FunctionImpl(FunctionType type) Construct a new FunctionImpl with the supplied FunctionType.

Method Summary

Modifier and Type	Method and Description
Data	__getitem__(Real domain) A wrapper around evaluate for JPython.
Data	__getitem__(RealTuple domain) A wrapper around evaluate for JPython.
abstract Data	derivative(int error_mode) return the tuple of derivatives of this Function with respect to all RealType components of its domain RealTuple; propogate errors according to error_mode
abstract Data	derivative(MathType[] derivType_s, int error_mode) return the tuple of derivatives of this Function with respect to all RealType components of its domain RealTuple; set result MathTypes of tuple components to derivType_s; propogate errors according to error_mode
abstract Data	derivative(RealTuple location, RealType[] d_partial_s, MathType[] derivType_s, int error_mode) return the tuple of derivatives of this Function with respect to the RealTypes in d_partial_s; the RealTypes in d_partial_s may occur in this Function's domain RealTupleType, or, if the domain has a CoordinateSystem, in its Reference RealTupleType; set result MathTypes of tuple components to derivType_s; propogate errors according to error_mode
abstract Function	derivative(RealType d_partial, int error_mode) return the derivative of this Function with respect to d_partial; d_partial may occur in this Function's domain RealTupleType, or, if the domain has a CoordinateSystem, in its Reference RealTupleType; propogate errors according to error_mode
abstract Function	derivative(RealType d_partial, MathType derivType, int error_mode) return the derivative of this Function with respect to d_partial; set result MathType to derivType; d_partial may occur in this Function's domain RealTupleType, or, if the domain has a CoordinateSystem, in its Reference RealTupleType; propogate errors according to error_mode
Data	evaluate(Real domain) Evaluate this Function at domain; use default modes for resampling (Data.WEIGHTED_AVERAGE) and errors (Data.NO_ERRORS)
Data	evaluate(Real domain, int sampling_mode, int error_mode) Evaluate this Function with non-default modes for resampling and errors
Data	evaluate(RealTuple domain) Evaluate this Function at domain; use default modes for resampling (Data.WEIGHTED_AVERAGE) and errors (Data.NO_ERRORS)
Data	evaluate(RealTuple domain, int sampling_mode, int error_mode) Evaluate this Function with non-default modes for resampling and errors
CoordinateSystem	getDomainCoordinateSystem() Get the CoordinateSystem associated with the domain RealTuple
int	getDomainDimension() Get the dimension (number of RealType components) of this Function's domain
Unit[]	getDomainUnits() Get the default Units of the Real components of the domain.
Field	resample(Set set) Return a Field of Function values at the samples in set using default sampling_mode (WEIGHTED_AVERAGE) and error_mode (NO_ERRORS); This combines unit conversions, coordinate transforms, resampling and interpolation
abstract Field	resample(Set set, int sampling_mode, int error_mode) Resample range values of this Function to domain samples in set; return a Field (i.e., a finite sampling of a Function).

Methods inherited from class visad.DataImpl

__add__, __add__, __div__, __div__, __mod__, __mod__, __mul__, __mul__, __neg__, __pow__, __pow__, __radd__, __rdiv__, __rmod__, __rmul__, __rpow__, __rsub__, __sub__, __sub__, abs, abs, acos, acos, acosDegrees, acosDegrees, add, add, adjustSamplingError, asin, asin, asinDegrees, asinDegrees, atan, atan, atan2, atan2, atan2Degrees, atan2Degrees, atanDegrees, atanDegrees, binary, binary, ceil, ceil, changeMathType, clone, computeRanges, computeRanges, cos, cos, cosDegrees, cosDegrees, dataClone, divide, divide, exp, exp, floor, floor, getType, local, log, log, longString, longString, main, max, max, min, min, multiply, multiply, negate, negate, notifyReferences, pow, pow, remainder, remainder, rint, rint, round, round, sin, sin, sinDegrees, sinDegrees, sqrt, sqrt, subtract, subtract, tan, tan, tanDegrees, tanDegrees, toString, unary, unary

Methods inherited from class visad.ThingImpl

addReference, removeReference

Methods inherited from class java.lang.Object

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

Methods inherited from interface visad.Data

abs, abs, acos, acos, acosDegrees, acosDegrees, add, add, adjustSamplingError, asin, asin, asinDegrees, asinDegrees, atan, atan, atan2, atan2, atan2Degrees, atan2Degrees, atanDegrees, atanDegrees, binary, binary, ceil, ceil, changeMathType, computeRanges, computeRanges, computeRanges, cos, cos, cosDegrees, cosDegrees, dataClone, divide, divide, exp, exp, floor, floor, getType, isMissing, local, log, log, longString, longString, max, max, min, min, multiply, multiply, negate, negate, pow, pow, remainder, remainder, rint, rint, round, round, sin, sin, sinDegrees, sinDegrees, sqrt, sqrt, subtract, subtract, tan, tan, tanDegrees, tanDegrees, unary, unary

Methods inherited from interface visad.Thing

addReference, removeReference

Constructor Detail

FunctionImpl

public FunctionImpl(FunctionType type)

Construct a new FunctionImpl with the supplied FunctionType.

Parameters:

type - FunctionType used to define the structure

Method Detail

getDomainDimension

public int getDomainDimension()

Get the dimension (number of RealType components) of this Function's domain

Specified by:

getDomainDimension in interface Function

Returns:

number of RealType components (n in R^n space)

getDomainUnits

public Unit[] getDomainUnits()

Get the default Units of the Real components of the domain.

Specified by:

getDomainUnits in interface Function

Returns:

array of Unit-s in the same order as the RealTypes in the domain.

getDomainCoordinateSystem

public CoordinateSystem getDomainCoordinateSystem()

Get the CoordinateSystem associated with the domain RealTuple

Specified by:

getDomainCoordinateSystem in interface Function

Returns:

CoordinateSystem of the domain

evaluate

public Data evaluate(Real domain)
              throws VisADException,
                     java.rmi.RemoteException

Evaluate this Function at domain; use default modes for resampling (Data.WEIGHTED_AVERAGE) and errors (Data.NO_ERRORS)

Specified by:

evaluate in interface Function

Parameters:

domain - value to evaluate at.

Returns:

Data object corresponding to the function value at that domain. may return a missing data object of the same type as the Function's range.

Throws:

VisADException - unable to evaluate function

java.rmi.RemoteException - Java RMI exception

evaluate

public Data evaluate(Real domain,
                     int sampling_mode,
                     int error_mode)
              throws VisADException,
                     java.rmi.RemoteException

Evaluate this Function with non-default modes for resampling and errors

Specified by:

evaluate in interface Function

Parameters:

domain - value to evaluate at.

sampling_mode - type of interpolation to perform (e.g., Data.WEIGHTED_AVERAGE, Data.NEAREST_NEIGHBOR)

error_mode - type of error estimation to perform (e.g., Data.INDEPENDENT, Data.DEPENDENT, Data.NO_ERRORS)

Returns:

Data object corresponding to the function value at that domain, using the sampling_mode and error_modes specified. May return a missing data object of the same type as the Function's range.

Throws:

VisADException - unable to evaluate function

java.rmi.RemoteException - Java RMI exception

evaluate

public Data evaluate(RealTuple domain)
              throws VisADException,
                     java.rmi.RemoteException

Evaluate this Function at domain; use default modes for resampling (Data.WEIGHTED_AVERAGE) and errors (Data.NO_ERRORS)

Specified by:

evaluate in interface Function

Parameters:

domain - value to evaluate at.

Returns:

Data object corresponding to the function value at that domain. may return a missing data object of the same type as the Function's range.

Throws:

VisADException - unable to evaluate function

java.rmi.RemoteException - Java RMI exception

evaluate

public Data evaluate(RealTuple domain,
                     int sampling_mode,
                     int error_mode)
              throws VisADException,
                     java.rmi.RemoteException

Evaluate this Function with non-default modes for resampling and errors

Specified by:

evaluate in interface Function

Parameters:

domain - value to evaluate at.

sampling_mode - type of interpolation to perform (e.g., Data.WEIGHTED_AVERAGE, Data.NEAREST_NEIGHBOR)

error_mode - type of error estimation to perform (e.g., Data.INDEPENDENT, Data.DEPENDENT, Data.NO_ERRORS)

Returns:

Data object corresponding to the function value at that domain, using the sampling_mode and error_modes specified. May return a missing data object of the same type as the Function's range.

Throws:

VisADException - unable to evaluate function

java.rmi.RemoteException - Java RMI exception

resample

public Field resample(Set set)
               throws VisADException,
                      java.rmi.RemoteException

Return a Field of Function values at the samples in set using default sampling_mode (WEIGHTED_AVERAGE) and error_mode (NO_ERRORS); This combines unit conversions, coordinate transforms, resampling and interpolation

Specified by:

resample in interface Function

Parameters:

set - finite sampling values for the function.

Returns:

Data object corresponding to the function value at that domain. may return a missing data object of the same type as the Function's range.

Throws:

VisADException - unable to resample function

java.rmi.RemoteException - Java RMI exception

resample

public abstract Field resample(Set set,
                               int sampling_mode,
                               int error_mode)
                        throws VisADException,
                               java.rmi.RemoteException

Resample range values of this Function to domain samples in set; return a Field (i.e., a finite sampling of a Function). Use the specified sampling_mode and error_mode. This combines unit conversions, coordinate transforms, resampling and interpolation

Specified by:

resample in interface Function

Parameters:

set - finite sampling values for the function.

sampling_mode - type of interpolation to perform (e.g., Data.WEIGHTED_AVERAGE, Data.NEAREST_NEIGHBOR)

error_mode - type of error estimation to perform (e.g., Data.INDEPENDENT, Data.DEPENDENT, Data.NO_ERRORS)

Returns:

Data object corresponding to the function value at that domain, using the sampling_mode and error_modes specified. May return a missing data object of the same type as the Function's range.

Throws:

VisADException - unable to resample function

java.rmi.RemoteException - Java RMI exception

derivative

public abstract Data derivative(RealTuple location,
                                RealType[] d_partial_s,
                                MathType[] derivType_s,
                                int error_mode)
                         throws VisADException,
                                java.rmi.RemoteException

Description copied from interface: Function

return the tuple of derivatives of this Function with respect to the RealTypes in d_partial_s; the RealTypes in d_partial_s may occur in this Function's domain RealTupleType, or, if the domain has a CoordinateSystem, in its Reference RealTupleType; set result MathTypes of tuple components to derivType_s; propogate errors according to error_mode

Specified by:

derivative in interface Function

Throws:

VisADException

java.rmi.RemoteException

derivative

public abstract Data derivative(int error_mode)
                         throws VisADException,
                                java.rmi.RemoteException

Description copied from interface: Function

return the tuple of derivatives of this Function with respect to all RealType components of its domain RealTuple; propogate errors according to error_mode

Specified by:

derivative in interface Function

Throws:

VisADException

java.rmi.RemoteException

derivative

public abstract Data derivative(MathType[] derivType_s,
                                int error_mode)
                         throws VisADException,
                                java.rmi.RemoteException

Description copied from interface: Function

return the tuple of derivatives of this Function with respect to all RealType components of its domain RealTuple; set result MathTypes of tuple components to derivType_s; propogate errors according to error_mode

Specified by:

derivative in interface Function

Throws:

VisADException

java.rmi.RemoteException

derivative

public abstract Function derivative(RealType d_partial,
                                    int error_mode)
                             throws VisADException,
                                    java.rmi.RemoteException

Description copied from interface: Function

return the derivative of this Function with respect to d_partial; d_partial may occur in this Function's domain RealTupleType, or, if the domain has a CoordinateSystem, in its Reference RealTupleType; propogate errors according to error_mode

Specified by:

derivative in interface Function

Throws:

VisADException

java.rmi.RemoteException

derivative

public abstract Function derivative(RealType d_partial,
                                    MathType derivType,
                                    int error_mode)
                             throws VisADException,
                                    java.rmi.RemoteException

Description copied from interface: Function

return the derivative of this Function with respect to d_partial; set result MathType to derivType; d_partial may occur in this Function's domain RealTupleType, or, if the domain has a CoordinateSystem, in its Reference RealTupleType; propogate errors according to error_mode

Specified by:

derivative in interface Function

Throws:

VisADException

java.rmi.RemoteException

__getitem__

public Data __getitem__(Real domain)
                 throws VisADException,
                        java.rmi.RemoteException

A wrapper around evaluate for JPython.

Throws:

VisADException

java.rmi.RemoteException

__getitem__

public Data __getitem__(RealTuple domain)
                 throws VisADException,
                        java.rmi.RemoteException

A wrapper around evaluate for JPython.

Throws:

VisADException

java.rmi.RemoteException