_drovector-_dgematrix.hpp File Reference

Go to the source code of this file.

Functions
_drovector	operator* (const _drovector &vec, const _dgematrix &mat)

Function Documentation

_drovector operator* ( const _drovector &  vec, const _dgematrix &  mat  )

inline

_drovector*_dgematrix operator

Definition at line 3 of file _drovector-_dgematrix.hpp.

References _(), _dgematrix::array, _drovector::array, drovector::array, _dgematrix::destroy(), _drovector::destroy(), _drovector::l, _dgematrix::m, and _dgematrix::n.

{CPPL_VERBOSE_REPORT;
#ifdef  CPPL_DEBUG
  if(vec.l!=mat.m){
    ERROR_REPORT;
    std::cerr << "These vector and matrix can not make a product." << std::endl
              << "Your input was (" << vec.l << ") * (" << mat.m << "x" << mat.n << ")." << std::endl;
    exit(1);
  }
#endif//CPPL_DEBUG
  
  drovector newvec(mat.n);
  char trans ='T';
  double alpha =1.;
  CPPL_INT inc =1;
  double beta =0.;
  
  dgemv_( &trans, &mat.m, &mat.n, &alpha, mat.array, &mat.m, vec.array, &inc, &beta, newvec.array, &inc );
  
  vec.destroy();
  mat.destroy();
  return _(newvec);
}