root/Minuit2/MnEigen.h

0001 // @(#)root/minuit2:$Id$
0002 // Authors: M. Winkler, F. James, L. Moneta, A. Zsenei   2003-2005
0003
0004 /**********************************************************************
0005  *                                                                    *
0006  * Copyright (c) 2005 LCG ROOT Math team,  CERN/PH-SFT                *
0007  *                                                                    *
0008  **********************************************************************/
0009
0010 #ifndef ROOT_Minuit2_MnEigen
0011 #define ROOT_Minuit2_MnEigen
0012
0013 #include "Minuit2/MnConfig.h"
0014 #include <vector>
0015
0016 namespace ROOT {
0017
0018 namespace Minuit2 {
0019
0020 class MnUserCovariance;
0021
0022 /**
0023    API class for calculating the eigenvalues of symmetric matrix
0024  */
0025
0026 class MnEigen {
0027
0028 public:
0029    MnEigen() {}
0030
0031    ~MnEigen() {}
0032
0033    /// calculate the eigenvalues
0034    std::vector<double> operator()(const MnUserCovariance &) const;
0035
0036 private:
0037 };
0038
0039 } // namespace Minuit2
0040
0041 } // namespace ROOT
0042
0043 #endif // ROOT_Minuit2_MnEigen