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ZScoreCalculator.h
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//# Copyright (C) 2000,2001
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#ifndef SCIMATH_ZSCORECALCULATOR_H
#define SCIMATH_ZSCORECALCULATOR_H
#include <casacore/casa/aips.h>
#include <cmath>
#include <map>
#include <mutex>
#include <set>
namespace casacore {
class Mutex;
// This class contains static methods related to z-scores. A z-score is the
// number of standard deviations from the mean in a normal distribution.
class ZScoreCalculator {
public:
ZScoreCalculator() = delete;
// compute the maximum expected zscore given the number of points
// in a sample.
static Double getMaxZScore(uInt64 npts);
// Get the minimum number of points in a Gaussian distribution, such that
// the probability that the maximum of the distribution having the specified
// zscore is 0.5. <src>zscore</src> should be non-negative.
static inline uInt64 zscoreToNpts(Double zscore) {
return (uInt64)(0.5/erfc(zscore/sqrt(2)));
}
private:
static std::map<uInt64, Double> _nptsToMaxZScore;
static std::mutex _mutex;
};
}
#endif
casacore::ZScoreCalculator::zscoreToNpts
static uInt64 zscoreToNpts(Double zscore)
Get the minimum number of points in a Gaussian distribution, such that the probability that the maxim...
Definition ZScoreCalculator.h:54
casacore::ZScoreCalculator::_mutex
static std::mutex _mutex
Definition ZScoreCalculator.h:60
casacore::ZScoreCalculator::_nptsToMaxZScore
static std::map< uInt64, Double > _nptsToMaxZScore
Definition ZScoreCalculator.h:59
casacore::ZScoreCalculator::ZScoreCalculator
ZScoreCalculator()=delete
casacore::ZScoreCalculator::getMaxZScore
static Double getMaxZScore(uInt64 npts)
compute the maximum expected zscore given the number of points in a sample.
casacore
this file contains all the compiler specific defines
Definition mainpage.dox:28
casacore::sqrt
LatticeExprNode sqrt(const LatticeExprNode &expr)
casacore::Double
double Double
Definition aipstype.h:53
casacore::uInt64
unsigned long long uInt64
Definition aipsxtype.h:37