no.uib.cipr.matrix
Class GivensRotation

java.lang.Object
  no.uib.cipr.matrix.GivensRotation

public class GivensRotation
extends java.lang.Object

Givens plane rotation

Constructor Summary

GivensRotation(double x, double y)
Constructs a Givens plane rotation for a given 2-vector

Method Summary

void	apply(Matrix H, int column, int i1, int i2) Applies the Givens rotation to two elements in a matrix column
void	apply(Vector x, int i1, int i2) Applies the Givens rotation to two elements of a vector

Methods inherited from class java.lang.Object

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

Constructor Detail

GivensRotation

public GivensRotation(double x,
                      double y)

Constructs a Givens plane rotation for a given 2-vector

Parameters:

x - First component of the vector

y - Second component of the vector

Method Detail

apply

public void apply(Matrix H,
                  int column,
                  int i1,
                  int i2)

Applies the Givens rotation to two elements in a matrix column

Parameters:

H - Matrix to apply to

column - Column index

i1 - Row index of first element

i2 - Row index of second element

apply

public void apply(Vector x,
                  int i1,
                  int i2)

Applies the Givens rotation to two elements of a vector

Parameters:

x - Vector to apply to

i1 - Index of first element

i2 - Index of second element