org.lcsim.recon.emid.hmatrix

Class InterpolatedHMatrix

java.lang.Object

org.lcsim.recon.emid.hmatrix.InterpolatedHMatrix

public class InterpolatedHMatrix
extends Object

This class interpolates the average values and inverse covariance matrix elements for photon showers based on derivations at fixed energy and angle.

Author:

Norman Graf

Field Summary

Fields

Modifier and Type	Field and Description
private int	_covDim
private BilinearInterpolator[]	_covInterpolators
private int	_dim
private BilinearInterpolator[]	_valInterpolators

Constructor Summary

Constructors

Constructor and Description
InterpolatedHMatrix(int dim, BilinearInterpolator[] valInterpolators, BilinearInterpolator[] covInterpolators) Creates a new instance of InterpolatedHMatrix

Method Summary

Methods

Modifier and Type	Method and Description
double	zeta(double theta, double energy, double[] dat) Returns the closeness of the vector dat to the expectations based on an interpolation between discrete values of angle and energy at which showers were simulated.

Methods inherited from class java.lang.Object

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

Field Detail

_valInterpolators

private BilinearInterpolator[] _valInterpolators

_covInterpolators

private BilinearInterpolator[] _covInterpolators

_dim

private int _dim

_covDim

private int _covDim

Constructor Detail

InterpolatedHMatrix

public InterpolatedHMatrix(int dim,
                   BilinearInterpolator[] valInterpolators,
                   BilinearInterpolator[] covInterpolators)

Creates a new instance of InterpolatedHMatrix

Method Detail

zeta

public double zeta(double theta,
          double energy,
          double[] dat)

Returns the closeness of the vector dat to the expectations based on an interpolation between discrete values of angle and energy at which showers were simulated.

Parameters:

theta - the polar angle

energy - the energy of the electromagnetic shower

dat - the vector of fractional energies by layer

Returns:

the distance of this shower to that expected, chi-squared for normal distributions of layer energies.