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dgbmatrix-calc.hpp File Reference

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Functions

_dgbmatrix t (const dgbmatrix &mat)
 
_dgematrix i (const dgbmatrix &mat)
 

Function Documentation

_dgbmatrix t ( const dgbmatrix mat)
inline

return transposed dgbmatrix

Definition at line 3 of file dgbmatrix-calc.hpp.

References _(), i(), dgbmatrix::kl, dgbmatrix::ku, dgbmatrix::m, and dgbmatrix::n.

4 {CPPL_VERBOSE_REPORT;
5  dgbmatrix newmat(mat.n, mat.m, mat.ku, mat.kl);
6 
7  for(CPPL_INT i=0; i<newmat.m; i++){
8  const CPPL_INT jmax =std::min(newmat.n,i+newmat.ku+1);
9  for(CPPL_INT j=std::max(CPPL_INT(0),i-newmat.kl); j<jmax; j++){
10  newmat(i,j) =mat(j,i);
11  }
12  }
13 
14  return _(newmat);
15 }
CPPL_INT m
matrix row size
Definition: dgbmatrix.hpp:9
CPPL_INT kl
lower band width
Definition: dgbmatrix.hpp:11
CPPL_INT ku
upper band width
Definition: dgbmatrix.hpp:12
CPPL_INT m
matrix row size
Definition: _dgematrix.hpp:9
Real Double-precision General Band Matrix Class.
Definition: dgbmatrix.hpp:3
_dgematrix i(const dgbmatrix &mat)
CPPL_INT n
matrix column size
Definition: dgbmatrix.hpp:10
_dcovector _(dcovector &vec)
_dgematrix i ( const dgbmatrix mat)
inline

return its inverse matrix

Definition at line 19 of file dgbmatrix-calc.hpp.

References _(), dgbmatrix::dgbsv(), dgematrix::identity(), dgbmatrix::m, and dgbmatrix::n.

Referenced by t().

20 {CPPL_VERBOSE_REPORT;
21 #ifdef CPPL_DEBUG
22  if(mat.m!=mat.n){
23  ERROR_REPORT;
24  std::cerr << "This matrix is not square and has no inverse matrix." << std::endl
25  << "Your input was (" << mat.m << "x" << mat.n << ")." << std::endl;
26  exit(1);
27  }
28 #endif//CPPL_DEBUG
29 
30  dgbmatrix mat_cp(mat);
31  dgematrix mat_inv(mat.m,mat.n);
32  mat_inv.identity();
33  mat_cp.dgbsv(mat_inv);
34 
35  return _(mat_inv);
36 }
CPPL_INT m
matrix row size
Definition: dgbmatrix.hpp:9
Real Double-precision General Dence Matrix Class.
Definition: dgematrix.hpp:3
Real Double-precision General Band Matrix Class.
Definition: dgbmatrix.hpp:3
CPPL_INT n
matrix column size
Definition: dgbmatrix.hpp:10
_dcovector _(dcovector &vec)