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Reference Guide
SqrtLowParameterTransformation.h
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1// @(#)root/minuit2:$Id$
2// Authors: M. Winkler, F. James, L. Moneta, A. Zsenei, E.G.P. Bos 2003-2017
3
4/**********************************************************************
5 * *
6 * Copyright (c) 2005 LCG ROOT Math team, CERN/PH-SFT *
7 * *
8 **********************************************************************/
9
10// Project : LCG
11// Package : Minuit
12// Author : Lorenzo.MONETA@cern.ch
13// Created by: moneta at Thu Apr 8 10:26:22 2004
14
15#ifndef ROOT_Minuit2_SqrtLowParameterTransformation
16#define ROOT_Minuit2_SqrtLowParameterTransformation
17
18namespace ROOT {
19
20namespace Minuit2 {
21
22class MnMachinePrecision;
23
24/**
25 * Transformation from external to internal Parameter based on sqrt(1 + x**2)
26 *
27 * This transformation applies for the case of single side Lower Parameter limits
28 */
29
30class SqrtLowParameterTransformation /* : public ParameterTransformation */ {
31
32public:
34
36
37 // transformation from internal to external
38 long double Int2ext(long double Value, long double Lower) const;
39
40 // transformation from external to internal
41 long double Ext2int(long double Value, long double Lower, const MnMachinePrecision &) const;
42
43 // derivative of transformation from internal to external
44 long double DInt2Ext(long double Value, long double Lower) const;
45
46private:
47};
48
49} // namespace Minuit2
50
51} // namespace ROOT
52
53#endif
Sets the relative floating point (double) arithmetic precision.
Transformation from external to internal Parameter based on sqrt(1 + x**2)
long double Ext2int(long double Value, long double Lower, const MnMachinePrecision &) const
long double DInt2Ext(long double Value, long double Lower) const
long double Int2ext(long double Value, long double Lower) const
This file contains a specialised ROOT message handler to test for diagnostic in unit tests.