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_dssmatrix-dcovector.hpp
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1 //=============================================================================
2 /*! _dssmatrix*dcovector operator */
3 inline _dcovector operator*(const _dssmatrix& mat, const dcovector& vec)
4 {CPPL_VERBOSE_REPORT;
5 #ifdef CPPL_DEBUG
6  if(mat.n!=vec.l){
7  ERROR_REPORT;
8  std::cerr << "These matrix and vector can not make a product." << std::endl
9  << "Your input was (" << mat.n << "x" << mat.n << ") * (" << vec.l << ")." << std::endl;
10  exit(1);
11  }
12 #endif//CPPL_DEBUG
13 
14  dcovector newvec(mat.n);
15  newvec.zero();
16 
17  const std::vector<dcomponent>::iterator mat_data_end =mat.data.end();
18  for(std::vector<dcomponent>::iterator it=mat.data.begin(); it!=mat_data_end; it++){
19  newvec(it->i) +=it->v*vec(it->j);
20  if(it->i!=it->j){
21  newvec(it->j) +=it->v*vec(it->i);
22  }
23  }
24 
25  mat.destroy();
26  return _(newvec);
27 }
std::vector< dcomponent > data
matrix data
Definition: _dssmatrix.hpp:12
(DO NOT USE) Smart-temporary Real Double-precision Symmetric Sparse Matrix Class
Definition: _dssmatrix.hpp:3
CPPL_INT l
vector size
Definition: dcovector.hpp:9
dcovector & zero()
_dcovector operator*(const _dssmatrix &mat, const dcovector &vec)
CPPL_INT n
matrix column size
Definition: _dssmatrix.hpp:11
Real Double-precision Column Vector Class.
Definition: dcovector.hpp:3
void destroy() const
(DO NOT USE) Smart-temporary Real Double-precision Column Vector Class
Definition: _dcovector.hpp:3
_dcovector _(dcovector &vec)