mixpp: chmat.h Source File

chmat.h

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00001
00013 #ifndef CHMAT_H
00014 #define CHMAT_H
00015 
00016 #include "../bdmerror.h"
00017 #include "square_mat.h"
00018
00019 namespace bdm {
00020
00026 class chmat : public sqmat {
00027 protected:
00029     mat Ch;
00030 public:
00031
00032     void opupdt ( const vec &v, double w );
00033     mat to_mat() const;
00034     void mult_sym ( const mat &C );
00036     void mult_sym ( const mat &C , chmat &U ) const;
00037     void mult_sym_t ( const mat &C );
00039     void mult_sym_t ( const mat &C, chmat &U ) const;
00040     double logdet() const;
00041     vec sqrt_mult ( const vec &v ) const;
00042     double qform ( const vec &v ) const;
00043     double invqform ( const vec &v ) const;
00044     void clear();
00046     void add ( const chmat &A2, double w = 1.0 );
00048     void inv ( chmat &Inv ) const       {
00049         ( Inv.Ch ) = itpp::inv ( Ch ).T();
00050         Inv.dim = dim;
00051     }; //Fixme: can be more efficient
00052     ;
00053 //      void inv ( mat &Inv );
00054
00056     virtual ~chmat() {};
00058     chmat ( ) : sqmat (), Ch ( ) {};
00060     chmat ( const int dim0 ) : sqmat ( dim0 ), Ch ( dim0, dim0 ) {};
00062     chmat ( const vec &v ) : sqmat ( v.length() ), Ch ( diag ( sqrt ( v ) ) ) {};
00064     chmat ( const chmat &Ch0 ) : sqmat ( Ch0.dim ), Ch ( Ch0.dim, Ch0.dim ) {
00065         Ch = Ch0.Ch;
00066     }
00067
00069     chmat ( const mat &M ) : sqmat ( M.rows() ), Ch ( M.rows(), M.cols() ) {
00070         mat Q;
00071         bdm_assert_debug ( M.rows() == M.cols(), "chmat:: input matrix must be square!" );
00072         Ch = chol ( M );
00073     }
00074
00080     chmat ( const chmat &M, const ivec &perm ): sqmat(perm.length()) {
00081         mat complete = M.to_mat ();
00082         mat subs = complete.get_cols(perm);
00083         Ch = chol(subs.get_rows(perm));
00084     }
00085
00087     mat & _Ch() {
00088         return Ch;
00089     }
00091     const mat & _Ch() const {
00092         return Ch;
00093     }
00095     void setD ( const vec &nD ) {
00096         Ch = diag ( sqrt ( nD ) );
00097     }
00099     void setCh ( const vec &chQ ) {
00100         bdm_assert_debug ( chQ.length() == dim * dim, "wrong length" );
00101         copy_vector ( dim*dim, chQ._data(), Ch._data() );
00102     }
00104     void setCh ( const chmat &Ch0 ) {
00105         Ch = Ch0._Ch();
00106         dim = Ch0.rows();
00107     }
00109     void setCh ( const mat &Ch0 ) {
00110         //TODO check if Ch0 is OK!!!
00111         Ch = Ch0;
00112         dim = Ch0.rows();
00113     }
00114
00116     void setD ( const vec &nD, int i ) {
00117         for ( int j = i; j < nD.length(); j++ ) {
00118             Ch ( j, j ) = sqrt ( nD ( j - i ) );    //Fixme can be more general
00119         }
00120     }
00121
00123     chmat& operator += ( const chmat &A2 );
00125     chmat& operator -= ( const chmat &A2 );
00127     chmat& operator * ( const double &d ) {
00128         Ch*sqrt ( d );
00129         return *this;
00130     };
00132     chmat& operator = ( const chmat &A2 ) {
00133         Ch = A2.Ch;
00134         dim = A2.dim;
00135         return *this;
00136     }
00138     chmat& operator *= ( double x ) {
00139         Ch *= sqrt ( x );
00140         return *this;
00141     };
00142 };
00143
00144
00147 inline chmat& chmat::operator += ( const chmat & A2 )  {
00148     this->add ( A2 );
00149     return *this;
00150 }
00152 inline chmat& chmat::operator -= ( const chmat & A2 )  {
00153     this->add ( A2, -1.0 );
00154     return *this;
00155 }
00156
00157 }
00158
00159 #endif // CHMAT_H

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