drovector-dgbmatrix.hpp File Reference

Go to the source code of this file.

Functions
_drovector	operator* (const drovector &vec, const dgbmatrix &mat)

Function Documentation

_drovector operator* ( const drovector &  vec, const dgbmatrix &  mat  )

inline

drovector*dgbmatrix operator

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

References _(), drovector::array, dgbmatrix::array, dgbmatrix::kl, dgbmatrix::ku, drovector::l, dgbmatrix::m, and dgbmatrix::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 lda =mat.kl+mat.ku+1;
  CPPL_INT inc =1;
  double beta =0.;
  
  dgbmv_( &trans, &mat.m, &mat.n, &mat.kl, &mat.ku, &alpha, mat.array, &lda, vec.array, &inc, &beta, newvec.array, &inc );
  
  return _(newvec);
}