/usr/include/casacore/scimath/Mathematics/ZScoreCalculator.h is in casacore-dev 2.2.0-2.
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//# 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: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id: HostInfoDarwin.h 21521 2014-12-10 08:06:42Z gervandiepen $
#ifndef SCIMATH_ZSCORECALCULATOR_H
#define SCIMATH_ZSCORECALCULATOR_H
#include <casacore/casa/aips.h>
#include <map>
#include <set>
#include <math.h>
namespace casacore {
/*
* 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:
// 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;
};
}
#endif
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