uk.ac.starlink.ttools.plot

Class Rounder

java.lang.Object

uk.ac.starlink.ttools.plot.Rounder

public abstract class Rounder
extends Object

Provides round numbers. Static instances are provided for rounding numbers to be used in a linear or a logarithmic context.

Since:

18 Nov 2005

Author:

Mark Taylor

Field Summary

Fields

Modifier and Type	Field and Description
static Rounder	LINEAR Number rounder for linear scaling.
static Rounder	LOG Number rounder for logarithmic scaling.
static Rounder	TIME_SECOND Number rounder for time intervals in seconds.

Constructor Summary

Constructors

Constructor and Description
Rounder()

Method Summary

Modifier and Type	Method and Description
abstract double	nextDown(double value) Returns the next round number smaller than the given value.
abstract double	nextUp(double value) Returns the next round number larger than the given value.
abstract double	round(double value) Returns a round number near the given value.

Methods inherited from class java.lang.Object

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

Field Detail

LINEAR

public static final Rounder LINEAR

Number rounder for linear scaling. All values are >0.

LOG

public static final Rounder LOG

Number rounder for logarithmic scaling. All values are >1.

TIME_SECOND

public static final Rounder TIME_SECOND

Number rounder for time intervals in seconds. All values are >0.

Constructor Detail

Rounder

public Rounder()

Method Detail

round

public abstract double round(double value)

Returns a round number near the given value.

Parameters:

value - input value

Returns:

round number near value

nextUp

public abstract double nextUp(double value)

Returns the next round number larger than the given value.

Parameters:

value - input value

Returns:

round number a bit larger than value

nextDown

public abstract double nextDown(double value)

Returns the next round number smaller than the given value.

Parameters:

value - input value

Returns:

round number a bit smaller than the given value