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SimplexParameters.cxx
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1 // @(#)root/minuit2:$Id$
2 // Authors: M. Winkler, F. James, L. Moneta, A. Zsenei 2003-2005
3 
4 /**********************************************************************
5  * *
6  * Copyright (c) 2005 LCG ROOT Math team, CERN/PH-SFT *
7  * *
8  **********************************************************************/
9 
11 
12 namespace ROOT {
13 
14 namespace Minuit2 {
15 
17 {
18  // update the SimplexParameter object with a new value y = FCN(p)
19  fSimplexParameters[Jh()] = std::pair<double, MnAlgebraicVector>(y, p);
20  if (y < fSimplexParameters[Jl()].first)
21  fJLow = Jh();
22 
23  unsigned int jh = 0;
24  for (unsigned int i = 1; i < fSimplexParameters.size(); i++) {
26  jh = i;
27  }
28  fJHigh = jh;
29 
30  return;
31 }
32 
34 {
35  // find simplex direction (vector from big to smaller parameter points)
36  MnAlgebraicVector dirin(fSimplexParameters.size() - 1);
37  for (unsigned int i = 0; i < fSimplexParameters.size() - 1; i++) {
38  double pbig = fSimplexParameters[0].second(i), plit = pbig;
39  for (unsigned int j = 0; j < fSimplexParameters.size(); j++) {
40  if (fSimplexParameters[j].second(i) < plit)
41  plit = fSimplexParameters[j].second(i);
42  if (fSimplexParameters[j].second(i) > pbig)
43  pbig = fSimplexParameters[j].second(i);
44  }
45  dirin(i) = pbig - plit;
46  }
47 
48  return dirin;
49 }
50 
51 } // namespace Minuit2
52 
53 } // namespace ROOT
first
Definition: first.py:1
ROOT::Minuit2::SimplexParameters::fJHigh
unsigned int fJHigh
Definition: SimplexParameters.h:56
ROOT::Minuit2::LAVector
Definition: LAVector.h:32
ROOT::Minuit2::SimplexParameters::Update
void Update(double, const MnAlgebraicVector &)
Definition: SimplexParameters.cxx:16
ROOT::Minuit2::SimplexParameters::Dirin
MnAlgebraicVector Dirin() const
Definition: SimplexParameters.cxx:33
y
Double_t y[n]
Definition: legend1.C:17
ROOT::Minuit2::SimplexParameters::fSimplexParameters
std::vector< std::pair< double, MnAlgebraicVector > > fSimplexParameters
Definition: SimplexParameters.h:55
ROOT::Minuit2::SimplexParameters::Jh
unsigned int Jh() const
Definition: SimplexParameters.h:49
ROOT::Minuit2::SimplexParameters::Jl
unsigned int Jl() const
Definition: SimplexParameters.h:50
TGeant4Unit::second
static constexpr double second
Definition: TGeant4SystemOfUnits.h:151
ROOT::Minuit2::SimplexParameters::fJLow
unsigned int fJLow
Definition: SimplexParameters.h:57
ROOT
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Definition: EExecutionPolicy.hxx:4
SimplexParameters.h