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Quad8F.h
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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 
10 #include "Minuit2/FCNBase.h"
11 
12 namespace ROOT {
13 
14  namespace Minuit2 {
15 
16 
17 class Quad8F : public FCNBase {
18 
19 public:
20 
21  double operator()(const std::vector<double>& par) const {
22 
23  double x = par[0];
24  double y = par[1];
25  double z = par[2];
26  double w = par[3];
27  double x0 = par[4];
28  double y0 = par[5];
29  double z0 = par[6];
30  double w0 = par[7];
31 
32 
33  return ( (1./70.)*(21*x*x + 20*y*y + 19*z*z - 14*x*z - 20*y*z) + w*w + (1./70.)*(21*x0*x0 + 20*y0*y0 + 19*z0*z0 - 14*x0*z0 - 20*y0*z0) + w0*w0 );
34  }
35 
36  double Up() const {return 1.;}
37 
38 private:
39 
40 };
41 
42  } // namespace Minuit2
43 
44 } // namespace ROOT
double par[1]
Definition: unuranDistr.cxx:38
double operator()(const std::vector< double > &par) const
The meaning of the vector of parameters is of course defined by the user, who uses the values of thos...
Definition: Quad8F.h:21
Double_t x[n]
Definition: legend1.C:17
Float_t z[5]
Definition: Ifit.C:16
Interface (abstract class) defining the function to be minimized, which has to be implemented by the ...
Definition: FCNBase.h:47
tuple w
Definition: qtexample.py:51
Double_t y[n]
Definition: legend1.C:17
double Up() const
Error definition of the function.
Definition: Quad8F.h:36