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, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
     
    boolean
    equals(Object obj)
    Indicates whether some other object is "equal to" this one.
    final Class
    getClass()
    Returns the runtime class of an object.
    int
    hashCode()
    Returns a hash code value for the object.
    final void
    notify()
    Wakes up a single thread that is waiting on this object's monitor.
    final void
    notifyAll()
    Wakes up all threads that are waiting on this object's monitor.
    String
    toString()
    Returns a string representation of the object.
    final void
    wait()
    Causes current thread to wait until another thread invokes the method or the method for this object.
    final void
    wait(long timeout)
    Causes current thread to wait until either another thread invokes the method or the method for this object, or a specified amount of time has elapsed.
    final void
    wait(long timeout, int nanos)
    Causes current thread to wait until another thread invokes the method or the method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.

  • Field Details

    • NULL_VALUE

      public static final double NULL_VALUE
      A value that is used a null value.
      See Also:

  • 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