com.codename1.charts.util

Class MathHelper

java.lang.Object

com.codename1.charts.util.MathHelper

public class MathHelper
extends Object

Utility class for math operations.

Field Summary

Fields

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

Method Summary

Modifier and Type	Method and 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 java.lang.Object

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

Field Detail

NULL_VALUE

public static final double NULL_VALUE

A value that is used a null value.

See Also:

Constant Field Values

Method Detail

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