Class MathHelper

java.lang.Object

com.codename1.charts.util.MathHelper

public final class MathHelper
extends Object

Utility class for math operations.

Field Summary

Fields

Modifier and Type	Field	Description
static final double	NULL_VALUE	A value that is used a null value.

Method Summary

Modifier and Type	Method	Description
static List<Double>	getLabels(double start, double end, int approxNumLabels)	Computes a reasonable set of labels for a data interval and number of labels.
static double[]	minmax(List<Double> values)	Calculate the minimum and maximum values out of a list of doubles.

Methods inherited from class Object

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

Field Details

NULL_VALUE

public static final double NULL_VALUE

A value that is used a null value.

See Also:

• Constant Field Values

Method Details

minmax

public static double[] minmax(List<Double> values)

Calculate the minimum and maximum values out of a list of doubles.

Parameters

• values: the input values

Returns

an array with the minimum and maximum values

getLabels

public static List<Double> getLabels(double start,
 double end,
 int approxNumLabels)

Computes a reasonable set of labels for a data interval and number of labels.

Parameters

• start: start value

• end: final value

• approxNumLabels: desired number of labels

Returns

collection containing the label values