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vnl_real_eigensystem.h

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00001 #ifndef vnl_real_eigensystem_h_
00002 #define vnl_real_eigensystem_h_
00003 
00004 //:
00005 //  \file
00006 //  \brief Extract eigensystem of unsymmetric matrix M, using EISPACK
00007 //  \author Andrew W. Fitzgibbon, Oxford RRG, 23 Jan 97
00008 //
00009 //  Modifications
00010 //  dac (Manchester) 28/03/2001: tidied up documentation
00011 //
00012 
00013 #include <vcl_complex.h>
00014 #include <vnl/vnl_matrix.h>
00015 #include <vnl/vnl_diag_matrix.h>
00016 
00017 //: Extract eigensystem of unsymmetric matrix M, using the EISPACK routine
00018 //  vnl_eigensystem is a full-bore real eigensystem.  If your matrix 
00019 //  is symmetric, it is *much* better to use vnl_symmetric_eigensystem.
00020 
00021 class vnl_real_eigensystem {
00022 public:
00023   vnl_real_eigensystem(const vnl_matrix<double>& M);
00024   
00025 public:
00026   vnl_matrix<double> Vreal;
00027   
00028   //: Output matrix of eigenvectors, which will in general be complex.
00029   vnl_matrix<vcl_complex<double> > V;
00030   
00031   //: Output diagonal matrix of eigenvalues.
00032   vnl_diag_matrix<vcl_complex<double> > D;
00033 };
00034 
00035 #endif // vnl_real_eigensystem_h_

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