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1// @(#)root/matrix:$Id$
2// Authors: Fons Rademakers, Eddy Offermann Dec 2003
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
12#ifndef ROOT_TDecompSVD
13#define ROOT_TDecompSVD
16// //
17// Single Value Decomposition class //
18// //
21#include "TDecompBase.h"
23class TDecompSVD : public TDecompBase
25protected :
27 // A = fU fSig fV^T
28 TMatrixD fU; // orthogonal matrix
29 TMatrixD fV; // orthogonal matrix
30 TVectorD fSig; // diagonal of diagonal matrix
32 static Bool_t Bidiagonalize(TMatrixD &v,TMatrixD &u,TVectorD &sDiag,TVectorD &oDiag);
33 static Bool_t Diagonalize (TMatrixD &v,TMatrixD &u,TVectorD &sDiag,TVectorD &oDiag);
34 static void Diag_1 (TMatrixD &v,TVectorD &sDiag,TVectorD &oDiag,Int_t k);
35 static void Diag_2 (TVectorD &sDiag,TVectorD &oDiag,Int_t k,Int_t l);
36 static void Diag_3 (TMatrixD &v,TMatrixD &u,TVectorD &sDiag,TVectorD &oDiag,Int_t k,Int_t l);
37 static void SortSingular (TMatrixD &v,TMatrixD &u,TVectorD &sDiag);
39 virtual const TMatrixDBase &GetDecompMatrix() const { return fU; }
41public :
43 enum {kWorkMax = 100}; // size of work array
45 TDecompSVD(): fU(), fV(), fSig() {}
46 TDecompSVD(Int_t nrows,Int_t ncols);
47 TDecompSVD(Int_t row_lwb,Int_t row_upb,Int_t col_lwb,Int_t col_upb);
48 TDecompSVD(const TMatrixD &m,Double_t tol = 0.0);
49 TDecompSVD(const TDecompSVD &another);
50 virtual ~TDecompSVD() {}
52 const TMatrixD GetMatrix ();
53 virtual Int_t GetNrows () const;
54 virtual Int_t GetNcols () const;
55 const TMatrixD &GetU () { if ( !TestBit(kDecomposed) ) Decompose();
56 return fU; }
57 const TMatrixD &GetV () { if ( !TestBit(kDecomposed) ) Decompose();
58 return fV; }
60 return fSig; }
62 virtual void SetMatrix (const TMatrixD &a);
64 virtual Bool_t Decompose ();
65 virtual Bool_t Solve ( TVectorD &b);
66 virtual TVectorD Solve (const TVectorD& b,Bool_t &ok) { TVectorD x = b; ok = Solve(x);
67 const Int_t rowLwb = GetRowLwb();
68 x.ResizeTo(rowLwb,rowLwb+GetNcols()-1);
69 return x; }
70 virtual Bool_t Solve ( TMatrixDColumn &b);
71 virtual Bool_t TransSolve ( TVectorD &b);
72 virtual TVectorD TransSolve (const TVectorD& b,Bool_t &ok) { TVectorD x = b; ok = TransSolve(x);
73 const Int_t rowLwb = GetRowLwb();
74 x.ResizeTo(rowLwb,rowLwb+GetNcols()-1);
75 return x; }
77 virtual Double_t Condition ();
78 virtual void Det (Double_t &d1,Double_t &d2);
81 TMatrixD Invert (Bool_t &status);
82 TMatrixD Invert () {Bool_t status; return Invert(status); }
84 void Print(Option_t *opt ="") const; // *MENU*
86 TDecompSVD &operator= (const TDecompSVD &source);
88 ClassDef(TDecompSVD,1) // Matrix Decompositition SVD
#define b(i)
Definition: RSha256.hxx:100
int Int_t
Definition: RtypesCore.h:41
bool Bool_t
Definition: RtypesCore.h:59
double Double_t
Definition: RtypesCore.h:55
const char Option_t
Definition: RtypesCore.h:62
#define ClassDef(name, id)
Definition: Rtypes.h:326
Decomposition Base class.
Definition: TDecompBase.h:34
Int_t GetRowLwb() const
Definition: TDecompBase.h:73
Single Value Decomposition class.
Definition: TDecompSVD.h:24
virtual Double_t Condition()
Matrix condition number.
Definition: TDecompSVD.cxx:823
TVectorD fSig
Definition: TDecompSVD.h:30
virtual Bool_t Solve(TVectorD &b)
Solve Ax=b assuming the SVD form of A is stored .
Definition: TDecompSVD.cxx:615
static void Diag_3(TMatrixD &v, TMatrixD &u, TVectorD &sDiag, TVectorD &oDiag, Int_t k, Int_t l)
Step 3 in the matrix diagonalization.
Definition: TDecompSVD.cxx:416
static void Diag_2(TVectorD &sDiag, TVectorD &oDiag, Int_t k, Int_t l)
Step 2 in the matrix diagonalization.
Definition: TDecompSVD.cxx:398
TDecompSVD & operator=(const TDecompSVD &source)
Assignment operator.
Definition: TDecompSVD.cxx:930
virtual void Det(Double_t &d1, Double_t &d2)
Matrix determinant det = d1*TMath::Power(2.,d2)
Definition: TDecompSVD.cxx:846
virtual const TMatrixDBase & GetDecompMatrix() const
Definition: TDecompSVD.h:39
virtual Int_t GetNcols() const
Definition: TDecompSVD.cxx:870
virtual Int_t GetNrows() const
Definition: TDecompSVD.cxx:865
TMatrixD Invert()
Definition: TDecompSVD.h:82
TMatrixD fV
Definition: TDecompSVD.h:29
void Print(Option_t *opt="") const
Print class members.
Definition: TDecompSVD.cxx:919
static Bool_t Bidiagonalize(TMatrixD &v, TMatrixD &u, TVectorD &sDiag, TVectorD &oDiag)
Bidiagonalize the (m x n) - matrix a (stored in v) through a series of Householder transformations ap...
Definition: TDecompSVD.cxx:192
static void Diag_1(TMatrixD &v, TVectorD &sDiag, TVectorD &oDiag, Int_t k)
Step 1 in the matrix diagonalization.
Definition: TDecompSVD.cxx:374
TMatrixD fU
Definition: TDecompSVD.h:28
const TVectorD & GetSig()
Definition: TDecompSVD.h:59
static Bool_t Diagonalize(TMatrixD &v, TMatrixD &u, TVectorD &sDiag, TVectorD &oDiag)
Diagonalizes in an iterative fashion the bidiagonal matrix C as described through sDiag and oDiag,...
Definition: TDecompSVD.cxx:307
virtual TVectorD TransSolve(const TVectorD &b, Bool_t &ok)
Definition: TDecompSVD.h:72
const TMatrixD & GetV()
Definition: TDecompSVD.h:57
virtual TVectorD Solve(const TVectorD &b, Bool_t &ok)
Definition: TDecompSVD.h:66
virtual Bool_t TransSolve(TVectorD &b)
Solve A^T x=b assuming the SVD form of A is stored . Solution returned in b.
Definition: TDecompSVD.cxx:723
const TMatrixD GetMatrix()
Reconstruct the original matrix using the decomposition parts.
Definition: TDecompSVD.cxx:557
virtual ~TDecompSVD()
Definition: TDecompSVD.h:50
virtual Bool_t Decompose()
SVD decomposition of matrix If the decomposition succeeds, bit kDecomposed is set ,...
Definition: TDecompSVD.cxx:123
virtual void SetMatrix(const TMatrixD &a)
Set matrix to be decomposed.
Definition: TDecompSVD.cxx:582
const TMatrixD & GetU()
Definition: TDecompSVD.h:55
static void SortSingular(TMatrixD &v, TMatrixD &u, TVectorD &sDiag)
Perform a permutation transformation on the diagonal matrix S', so that matrix S'' = U''^T .
Definition: TDecompSVD.cxx:497
R__ALWAYS_INLINE Bool_t TestBit(UInt_t f) const
Definition: TObject.h:172
Double_t x[n]
Definition: legend1.C:17
void inv(rsa_NUMBER *, rsa_NUMBER *, rsa_NUMBER *)
Definition: rsaaux.cxx:949
auto * m
Definition: textangle.C:8
auto * l
Definition: textangle.C:4
auto * a
Definition: textangle.C:12