edu.wisc.ssec.mcidasv.data.adde.sgp4

Class MathUtils

java.lang.Object

edu.wisc.ssec.mcidasv.data.adde.sgp4.MathUtils

public class MathUtils
extends Object

Various Math functions; many of them for vector and matrix operations for 3 dimensions.

Constructor Summary

Constructors

Constructor and Description
MathUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static double	dot(double[] a, double[] b) dot product for 3D vectors
static double[][]	mult(double[][] a, double[][] b) multiply two matrices 3x3
static double	norm(double[] a) vector 2-norm
static double[]	sub(double[] a, double[] b) vector subtraction

Methods inherited from class java.lang.Object

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

Constructor Detail

MathUtils

public MathUtils()

Method Detail

norm

public static double norm(double[] a)

vector 2-norm

Parameters:

a - vector of length 3

Returns:

norm(a)

dot

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

dot product for 3D vectors

Parameters:

a - 3x1 vector

b - 3x1 vector

Returns:

a dot b

mult

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

multiply two matrices 3x3

Parameters:

a - 3x3 matrix

b - 3x3 matrix

Returns:

a x b

sub

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

vector subtraction

Parameters:

a - vector of length 3

b - vector of length 3

Returns:

a-b