marlin::ErrorOfSigma Class Reference

Small helper class that computes the lower and upper error of sigma assuming a normal distribution, i.e. More...

#include <ErrorOfSigma.h>

Public Member Functions
	ErrorOfSigma (unsigned n)
	C'tor takes the number of measured values.
virtual	~ErrorOfSigma ()
	Virtual d'tor. More...
double	lowerError (double sigma)
	The lower error of sigma.
double	upperError (double sigma)
	The upper error of sigma.

Protected Member Functions
virtual double	getChiSquaredPlus ()
	Returns the chisquared value with P(chisquared) == 0.84.
virtual double	getChiSquaredMinus ()
	Returns the chisquared value with P(chisquared) == 0.16.

Protected Attributes
unsigned	_n
	The number of degrees of freedom.

Detailed Description

Small helper class that computes the lower and upper error of sigma assuming a normal distribution, i.e.

sigma has been computed as sigma = 1. / (n-1) * SUM_i_n( x_i - a_i )**2.

Author

F. Gaede, DESY

Version

Id:

ErrorOfSigma.h,v 1.2 2005-10-11 12:56:28 gaede Exp

Constructor & Destructor Documentation

virtual marlin::ErrorOfSigma::~ErrorOfSigma ( )

inlinevirtual

Virtual d'tor.

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The documentation for this class was generated from the following files:

• ErrorOfSigma.h
• ErrorOfSigma.cc