_dgsmatrix-calc.hpp File Reference

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Functions
_dgsmatrix	t (const _dgsmatrix &mat)
void	idamax (CPPL_INT &i, CPPL_INT &j, const _dgsmatrix &mat)
double	damax (const _dgsmatrix &mat)

Function Documentation

_dgsmatrix t ( const _dgsmatrix &  mat )

inline

return transposed _dgsmatrix

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

References _dgsmatrix::cols, _dgsmatrix::data, _dgsmatrix::rows, and swap().

{CPPL_VERBOSE_REPORT;
  const std::vector<dcomponent>::iterator mat_data_end =mat.data.end();
  for(std::vector<dcomponent>::iterator it=mat.data.begin(); it!=mat_data_end; it++){
    std::swap(it->i,it->j);
  }
  
  std::swap(mat.rows,mat.cols);
  
  return mat;
}

void idamax ( CPPL_INT &  i, CPPL_INT &  j, const _dgsmatrix &  mat  )

inline

search the index of element having the largest absolute value in 0-based numbering system

Definition at line 22 of file _dgsmatrix-calc.hpp.

References _dgsmatrix::data, and _dgsmatrix::destroy().

{CPPL_VERBOSE_REPORT;
  std::vector<dcomponent>::const_iterator itx(mat.data.begin());
  double vmax(0);
  
  const std::vector<dcomponent>::const_iterator mat_data_end =mat.data.end();
  for(std::vector<dcomponent>::const_iterator it=mat.data.begin(); it!=mat_data_end; it++){
    if(vmax < it->v){
      vmax=fabs(it->v);
      itx=it;
    }
  }
  
  i=itx->i;
  j=itx->j;
  
  mat.destroy();
}

double damax ( const _dgsmatrix &  mat )

inline

return its largest absolute value

Definition at line 43 of file _dgsmatrix-calc.hpp.

References _dgsmatrix::data, and _dgsmatrix::destroy().

{CPPL_VERBOSE_REPORT;
  std::vector<dcomponent>::const_iterator itx(mat.data.begin());
  double vmax(0);
  
  const std::vector<dcomponent>::const_iterator mat_data_end =mat.data.end();
  for(std::vector<dcomponent>::const_iterator it=mat.data.begin(); it!=mat_data_end; it++){
    if(vmax < it->v){
      vmax=fabs(it->v);
      itx=it;
    }
  }
  
  mat.destroy();
  return itx->v;
}