PamUtils
Class CoordUtils

java.lang.Object
  PamUtils.CoordUtils

public class CoordUtils
extends java.lang.Object

Author:

David J McLaren

Constructor Summary

CoordUtils()

Method Summary

static double	dist(double[] a, double[] b) Given two N-element vectors representing positions, return the distance between them.
static double	dist(double[] a, double[] b, int n) Given two N-element vectors representing positions, return the distance between them.
static double	Pam3dRangeCalc(Coordinate3d a, Coordinate3d b) Given two Coordinate3d objects, return the distance between them.
static double	sumSquared(double[] x) Find the sum of squares of a vector.

Methods inherited from class java.lang.Object

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

Constructor Detail

CoordUtils

public CoordUtils()

Method Detail

Pam3dRangeCalc

public static double Pam3dRangeCalc(Coordinate3d a,
                                    Coordinate3d b)

Given two Coordinate3d objects, return the distance between them.

dist

public static double dist(double[] a,
                          double[] b)

Given two N-element vectors representing positions, return the distance between them. This is just the L2-norm of the two vectors. see See also CoordUtils.norm().

dist

public static double dist(double[] a,
                          double[] b,
                          int n)

Given two N-element vectors representing positions, return the distance between them. This is just the L2-norm of the two vectors. This one differs from the one above in the N is specified explicitly.

see See also CoordUtils.norm().

author Dave Mellinger

sumSquared

public static double sumSquared(double[] x)

Find the sum of squares of a vector.

see See also CoordUtils.dist().

author Dave Mellinger