C++ (Cpp) n_unique示例

示例#1

文件： fn_n_unique.hpp 项目： Aeryltic/labirynth

inline
uword
n_unique
  (
  const SpBase<typename T1::elem_type, T1>& x,
  const SpBase<typename T2::elem_type, T2>& y,
  const op_n_unique_type junk
  )
  {
  arma_extra_debug_sigprint();
  
  const SpProxy<T1> pa(x.get_ref());
  const SpProxy<T2> pb(y.get_ref());
  
  return n_unique(pa,pb,junk);
  }

示例#2

文件： spglue_plus_meat.hpp 项目： dragly/molecular-dynamics

arma_hot
inline
void
spglue_plus::apply_noalias(SpMat<eT>& out, const SpProxy<T1>& pa, const SpProxy<T2>& pb)
  {
  arma_extra_debug_sigprint();
  
  arma_debug_assert_same_size(pa.get_n_rows(), pa.get_n_cols(), pb.get_n_rows(), pb.get_n_cols(), "addition");

  if( (pa.get_n_nonzero() != 0) && (pb.get_n_nonzero() != 0) )
    {
    out.set_size(pa.get_n_rows(), pa.get_n_cols());
    
    // Resize memory to correct size.
    out.mem_resize(n_unique(pa, pb, op_n_unique_add()));
    
    // Now iterate across both matrices.
    typename SpProxy<T1>::const_iterator_type x_it = pa.begin();
    typename SpProxy<T2>::const_iterator_type y_it = pb.begin();
    
    typename SpProxy<T1>::const_iterator_type x_end = pa.end();
    typename SpProxy<T2>::const_iterator_type y_end = pb.end();
    
    uword cur_val = 0;
    while( (x_it != x_end) || (y_it != y_end) )
      {
      if(x_it == y_it)
        {
        const eT val = (*x_it) + (*y_it);
        
        if (val != eT(0))
          {
          access::rw(out.values[cur_val]) = val;
          access::rw(out.row_indices[cur_val]) = x_it.row();
          ++access::rw(out.col_ptrs[x_it.col() + 1]);
          ++cur_val;
          }

        ++x_it;
        ++y_it;
        }
      else
        {
        const uword x_it_row = x_it.row();
        const uword x_it_col = x_it.col();
        
        const uword y_it_row = y_it.row();
        const uword y_it_col = y_it.col();
        
        if((x_it_col < y_it_col) || ((x_it_col == y_it_col) && (x_it_row < y_it_row))) // if y is closer to the end
          {
          access::rw(out.values[cur_val]) = (*x_it);
          access::rw(out.row_indices[cur_val]) = x_it_row;
          ++access::rw(out.col_ptrs[x_it_col + 1]);
          ++cur_val;
          ++x_it;
          }
        else
          {
          access::rw(out.values[cur_val]) = (*y_it);
          access::rw(out.row_indices[cur_val]) = y_it_row;
          ++access::rw(out.col_ptrs[y_it_col + 1]);
          ++cur_val;
          ++y_it;
          }
        }
      }
    
    const uword out_n_cols = out.n_cols;
    
    uword* col_ptrs = access::rwp(out.col_ptrs);
    
    // Fix column pointers to be cumulative.
    for(uword c = 1; c <= out_n_cols; ++c)
      {
      col_ptrs[c] += col_ptrs[c - 1];
      }
    }
  else
    {
    if(pa.get_n_nonzero() == 0)
      {
      out = pb.Q;
      return;
      }
    
    if(pb.get_n_nonzero() == 0)
      {
      out = pa.Q;
      return;
      }
    }
  }

示例#3

文件： operator_schur.hpp 项目： PsycoTodd/Armadillo_OpenCV_XCode_Framework

inline
typename
enable_if2
  <
  (is_arma_sparse_type<T1>::value && is_arma_sparse_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
  SpMat<typename T1::elem_type>
  >::result
operator%
  (
  const SpBase<typename T1::elem_type, T1>& x,
  const SpBase<typename T2::elem_type, T2>& y
  )
  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::elem_type eT;

  const SpProxy<T1> pa(x.get_ref());
  const SpProxy<T2> pb(y.get_ref());

  arma_debug_assert_same_size(pa.get_n_rows(), pa.get_n_cols(), pb.get_n_rows(), pb.get_n_cols(), "element-wise multiplication");

  SpMat<typename T1::elem_type> result(pa.get_n_rows(), pa.get_n_cols());
  
  if( (pa.get_n_nonzero() != 0) && (pb.get_n_nonzero() != 0) )
    {
    // Resize memory to correct size.
    result.mem_resize(n_unique(x, y, op_n_unique_mul()));
    
    // Now iterate across both matrices.
    typename SpProxy<T1>::const_iterator_type x_it = pa.begin();
    typename SpProxy<T2>::const_iterator_type y_it = pb.begin();
    
    typename SpProxy<T1>::const_iterator_type x_end = pa.end();
    typename SpProxy<T2>::const_iterator_type y_end = pb.end();
    
    uword cur_val = 0;
    while((x_it != x_end) || (y_it != y_end))
      {
      if(x_it == y_it)
        {
        const eT val = (*x_it) * (*y_it);
        
        if (val != eT(0))
          {
          access::rw(result.values[cur_val]) = val;
          access::rw(result.row_indices[cur_val]) = x_it.row();
          ++access::rw(result.col_ptrs[x_it.col() + 1]);
          ++cur_val;
          }
        
        ++x_it;
        ++y_it;
        }
      else
        {
        const uword x_it_row = x_it.row();
        const uword x_it_col = x_it.col();
        
        const uword y_it_row = y_it.row();
        const uword y_it_col = y_it.col();
        
        if((x_it_col < y_it_col) || ((x_it_col == y_it_col) && (x_it_row < y_it_row))) // if y is closer to the end
          {
          ++x_it;
          }
        else
          {
          ++y_it;
          }
        }
      }
    
    // Fix column pointers to be cumulative.
    for(uword c = 1; c <= result.n_cols; ++c)
      {
      access::rw(result.col_ptrs[c]) += result.col_ptrs[c - 1];
      }
    }
  
  return result;
  }

示例#4

文件： spglue_minus_meat.hpp 项目： ELEN4002-Lab-Project-2012/ELEN4002-Lab-Project

arma_hot
inline
void
spglue_minus::apply_noalias(SpMat<eT>& result, const SpProxy<T1>& pa, const SpProxy<T2>& pb)
  {
  arma_extra_debug_sigprint();
  
  arma_debug_assert_same_size(pa.get_n_rows(), pa.get_n_cols(), pb.get_n_rows(), pb.get_n_cols(), "subtraction");

  result.set_size(pa.get_n_rows(), pa.get_n_cols());

  // Resize memory to correct size.
  result.mem_resize(n_unique(pa, pb, op_n_unique_sub()));

  // Now iterate across both matrices.
  typename SpProxy<T1>::const_iterator_type x_it = pa.begin();
  typename SpProxy<T2>::const_iterator_type y_it = pb.begin();

  uword cur_val = 0;
  while((x_it.pos() < pa.get_n_nonzero()) || (y_it.pos() < pb.get_n_nonzero()))
    {
    if(x_it == y_it)
      {
      const typename T1::elem_type val = (*x_it) - (*y_it);
      if (val != 0)
        {
        access::rw(result.values[cur_val]) = val;
        access::rw(result.row_indices[cur_val]) = x_it.row();
        ++access::rw(result.col_ptrs[x_it.col() + 1]);
        ++cur_val;
        }

      ++x_it;
      ++y_it;
      }
    else
      {
      if((x_it.col() < y_it.col()) || ((x_it.col() == y_it.col()) && (x_it.row() < y_it.row()))) // if y is closer to the end
        {
        access::rw(result.values[cur_val]) = (*x_it);
        access::rw(result.row_indices[cur_val]) = x_it.row();
        ++access::rw(result.col_ptrs[x_it.col() + 1]);
        ++cur_val;
        ++x_it;
        }
      else
        {
        access::rw(result.values[cur_val]) = -(*y_it);
        access::rw(result.row_indices[cur_val]) = y_it.row();
        ++access::rw(result.col_ptrs[y_it.col() + 1]);
        ++cur_val;
        ++y_it;
        }
      }
    }

  // Fix column pointers to be cumulative.
  for(uword c = 1; c <= result.n_cols; ++c)
    {
    access::rw(result.col_ptrs[c]) += result.col_ptrs[c - 1];
    }
  }