org.lcsim.recon.emid.hmatrix

Class HMatrixBuilder

java.lang.Object

org.lcsim.recon.emid.hmatrix.HMatrixBuilder

public class HMatrixBuilder
extends Object

A class to construct an HMatrix.

Version:

1.0

Author:

Norman A. Graf

See Also:

HMatrix

Field Summary

Fields

Modifier and Type	Field and Description
private double[][]	_cov
private int	_dim
private HMatrix	_hmx
private boolean	_isValid
private int	_key
private int	_ndata
private double[]	_vals
private double[][]	_valsq
private double[]	_vec

Constructor Summary

Constructors

Constructor and Description
HMatrixBuilder(int n, int key) Construct an n x n HMatrixBuilder.

Method Summary

Methods

Modifier and Type	Method and Description
void	accumulate(double[] dat) Add the measurement vector to the accumulated HMatrix
private double[][]	invert(double[][] mat, int dim) Invert the matrix
HMatrix	read(String filename) Reads the HMatrix from an ASCII file
String	toString() Output Stream
void	validate() Validates the HMatrix by performing the averages
void	write(String filename, String comment) Writes out the HMatrix to an ASCII file

Methods inherited from class java.lang.Object

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

Field Detail

_cov

private double[][] _cov

_vec

private double[] _vec

_vals

private double[] _vals

_valsq

private double[][] _valsq

_dim

private int _dim

_key

private int _key

_ndata

private int _ndata

_isValid

private boolean _isValid

_hmx

private HMatrix _hmx

Constructor Detail

HMatrixBuilder

public HMatrixBuilder(int n,
              int key)

Construct an n x n HMatrixBuilder. Leaves HMatrix in an invalid state. One must either accumulate entries to build up the HMatrix or read in the HMatrix values from a file.

Parameters:

n - The dimension of the measurement space.

key - The key by which to index this HMatrix.

Method Detail

accumulate

public void accumulate(double[] dat)

Add the measurement vector to the accumulated HMatrix

Parameters:

dat - The array of measurements.

validate

public void validate()

Validates the HMatrix by performing the averages

toString

public String toString()

Output Stream

Overrides:

toString in class Object

Returns:

String representation of the object

read

public HMatrix read(String filename)

Reads the HMatrix from an ASCII file

Parameters:

filename - The ASCII file from which to read.

Returns:

The HMatrix

write

public void write(String filename,
         String comment)

Writes out the HMatrix to an ASCII file

Parameters:

filename - The file to which to write.

comment - A comment for the header.

invert

private double[][] invert(double[][] mat,
                int dim)

Invert the matrix