com.ijchart.xychart.tickunit
Class LogTickUnit

java.lang.Object
  com.ijchart.xychart.tickunit.DoubleTickUnit
      com.ijchart.xychart.tickunit.LogTickUnit

All Implemented Interfaces:

INumberTickUnit, java.io.Serializable, java.lang.Cloneable

public class LogTickUnit
extends DoubleTickUnit
implements java.lang.Cloneable, java.io.Serializable

Title: IJChart

Description: a chart library for the Java(tm) platform.

Calculate the tick unit for number data and all values is logarithmic.

Copyright: Copyright (c) 2013

Company:

Version:

1.0

Author:

zhang feng min,shanghai china. Contract me by email.

See Also:

Serialized Form

Field Summary

static double

DEFAULT_LOGARITHM_BASE The default logarithm base.

Constructor Summary

LogTickUnit()
A default constructor.

LogTickUnit(boolean notUseFlag, double step)
A constructor.

LogTickUnit(double logarithmBase, boolean notUseFlag)
A constructor.

LogTickUnit(double logarithmBase, double step)
A constructor.

Method Summary

java.lang.Object	clone() Returns a clone of the object.
boolean	equals(java.lang.Object obj) Tests the axis for equality with an arbitrary object.
double	getBaseLogValue() Returns the log value for base logarithm.
java.lang.String[]	getExponentLabels() Returns the exponent labels.
double	getLogarithmBase() Returns the logarithm base.
java.lang.String[]	getTickUnits(double minValue, double maxValue, int maxCount, boolean includeZero) According to the minimum and maximum data and the largest number of coordinates to determine the scale of axis,all values are double.
int	hashCode() Returns a hash code value for the object.
java.lang.String	toString() Returns a string representation of the object.

Methods inherited from class com.ijchart.xychart.tickunit.DoubleTickUnit

getStep

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_LOGARITHM_BASE

public static final double DEFAULT_LOGARITHM_BASE

The default logarithm base.

See Also:

Constant Field Values

Constructor Detail

LogTickUnit

public LogTickUnit()

A default constructor.

LogTickUnit

public LogTickUnit(double logarithmBase,
                   boolean notUseFlag)

A constructor.

Parameters:

logarithmBase - double The logarithm base,must be greater than 1.

notUseFlag - A boolean.

LogTickUnit

public LogTickUnit(boolean notUseFlag,
                   double step)

A constructor.

Parameters:

notUseFlag - A boolean.

step - double The step.

LogTickUnit

public LogTickUnit(double logarithmBase,
                   double step)

A constructor.

Parameters:

logarithmBase - double The logarithm base,must be greater than 1.

step - double The step.

Method Detail

getLogarithmBase

public double getLogarithmBase()

Returns the logarithm base.

Returns:

double The logarithm base.

getBaseLogValue

public double getBaseLogValue()

Returns the log value for base logarithm.

Returns:

double The log value for base logarithm.

getExponentLabels

public java.lang.String[] getExponentLabels()

Returns the exponent labels.

Returns:

String[] The exponent labels (maybe null).

getTickUnits

public java.lang.String[] getTickUnits(double minValue,
                                       double maxValue,
                                       int maxCount,
                                       boolean includeZero)

According to the minimum and maximum data and the largest number of coordinates to determine the scale of axis,all values are double.

Specified by:

getTickUnits in interface INumberTickUnit

Overrides:

getTickUnits in class DoubleTickUnit

Parameters:

minValue - double The minimum value.

maxValue - double The max value.

maxCount - int The maximum count of tick units (must great than 0).

includeZero - boolean A boolean flag indicates whether or not include zero value.

Returns:

String[] An array of tick units,the values are sorted ascending. All elements in array is number (never null).

equals

public boolean equals(java.lang.Object obj)

Tests the axis for equality with an arbitrary object.

Overrides:

equals in class DoubleTickUnit

Parameters:

obj - the object (null permitted).

Returns:

true or false.

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Returns a clone of the object.

Overrides:

clone in class DoubleTickUnit

Returns:

A clone.

Throws:

java.lang.CloneNotSupportedException - if some component of the axis does not support cloning.

hashCode

public int hashCode()

Returns a hash code value for the object.

Overrides:

hashCode in class DoubleTickUnit

Returns:

A hash code value for this object.

toString

public java.lang.String toString()

Returns a string representation of the object.

Overrides:

toString in class DoubleTickUnit

Returns:

A string representation of the object.