C++ Proxy::at方法代码示例

本文整理汇总了C++中Proxy::at方法的典型用法代码示例。如果您正苦于以下问题：C++ Proxy::at方法的具体用法？C++ Proxy::at怎么用？C++ Proxy::at使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Proxy的用法示例。

在下文中一共展示了Proxy::at方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: eT

arma_hot
inline
typename T1::elem_type
accu_proxy_at(const Proxy<T1>& P)
  {
  typedef typename T1::elem_type eT;
  
  const uword n_rows = P.get_n_rows();
  const uword n_cols = P.get_n_cols();
  
  eT val = eT(0);
    
  if(n_rows != 1)
    {
    for(uword col=0; col < n_cols; ++col)
    for(uword row=0; row < n_rows; ++row)
      {
      val += P.at(row,col);
      }
    }
  else
    {
    for(uword col=0; col < n_cols; ++col)
      {
      val += P.at(0,col);
      }
    }
  
  return val;
  }

开发者ID:2003pro，项目名称:armadillo，代码行数:30，代码来源:fn_accu.hpp

示例2:

arma_hot
inline
void
op_fft_cx::copy_vec_proxy(typename Proxy<T1>::elem_type* dest, const Proxy<T1>& P, const uword N)
  {
  arma_extra_debug_sigprint();
  
  if(Proxy<T1>::use_at == false)
    {
    typename Proxy<T1>::ea_type X = P.get_ea();
    
    for(uword i=0; i < N; ++i)  { dest[i] = X[i]; }
    }
  else
    {
    if(P.get_n_cols() == 1)
      {
      for(uword i=0; i < N; ++i)  { dest[i] = P.at(i,0); }
      }
    else
      {
      for(uword i=0; i < N; ++i)  { dest[i] = P.at(0,i); }
      }
    }
  }

开发者ID:EmanueleCannizzaro，项目名称:armadillo，代码行数:25，代码来源:op_fft_meat.hpp

示例3: P

arma_warn_unused
inline
typename T1::elem_type
det
  (
  const Op<T1, op_trimat>& X
  )
  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::elem_type eT;
  
  const Proxy<T1> P(X.m);
  
  const uword N = P.get_n_rows();
  
  arma_debug_check( (N != P.get_n_cols()), "det(): given matrix must be square sized" );
  
  eT val1 = eT(1);
  eT val2 = eT(1);
  
  uword i,j;
  for(i=0, j=1; j<N; i+=2, j+=2)
    {
    val1 *= P.at(i,i);
    val2 *= P.at(j,j);
    }
  
  if(i < N)
    {
    val1 *= P.at(i,i);
    }
  
  return val1 * val2;
  }

开发者ID:RcppCore，项目名称:RcppArmadillo，代码行数:35，代码来源:fn_det.hpp

示例4: pow

arma_hot
inline
typename T1::pod_type
arma_vec_norm_k
(
    const Proxy<T1>& P,
    const int k
)
{
    arma_extra_debug_sigprint();

    typedef typename T1::pod_type T;

    T acc = T(0);

    if(Proxy<T1>::prefer_at_accessor == false)
    {
        typename Proxy<T1>::ea_type A = P.get_ea();

        const uword N = P.get_n_elem();

        uword i,j;

        for(i=0, j=1; j<N; i+=2, j+=2)
        {
            acc += std::pow(std::abs(A[i]), k);
            acc += std::pow(std::abs(A[j]), k);
        }

        if(i < N)
        {
            acc += std::pow(std::abs(A[i]), k);
        }
    }
    else
    {
        const uword n_rows = P.get_n_rows();
        const uword n_cols = P.get_n_cols();

        if(n_rows != 1)
        {
            for(uword col=0; col < n_cols; ++col)
                for(uword row=0; row < n_rows; ++row)
                {
                    acc += std::pow(std::abs(P.at(row,col)), k);
                }
        }
        else
        {
            for(uword col=0; col < n_cols; ++col)
            {
                acc += std::pow(std::abs(P.at(0,col)), k);
            }
        }
    }

    return std::pow(acc, T(1)/T(k));
}

开发者ID:k8wells，项目名称:452p1，代码行数:58，代码来源:fn_norm.hpp

示例5:

inline
podarray<eT>::podarray(const Proxy<T1>& P)
  : n_elem(P.get_n_elem())
  {
  arma_extra_debug_sigprint_this(this);
  
  const uword P_n_elem = P.get_n_elem();
    
  init_cold(P_n_elem);
  
  eT* out_mem = (*this).memptr();
    
  if(Proxy<T1>::use_at == false)
    {
    typename Proxy<T1>::ea_type A = P.get_ea();
    
    uword i,j;
    for(i=0, j=1; j < P_n_elem; i+=2, j+=2)
      {
      const eT val_i = A[i];
      const eT val_j = A[j];
      
      out_mem[i] = val_i;
      out_mem[j] = val_j;
      }
    
    if(i < P_n_elem)
      {
      out_mem[i] = A[i];
      }
    }
  else
    {
    const uword P_n_rows = P.get_n_rows();
    const uword P_n_cols = P.get_n_cols();
    
    if(P_n_rows != 1)
      {
      uword count = 0;
      
      for(uword col=0; col < P_n_cols; ++col)
      for(uword row=0; row < P_n_rows; ++row, ++count)
        {
        out_mem[count] = P.at(row,col);
        }
      }
    else
      {
      for(uword col=0; col < P_n_cols; ++col)
        {
        out_mem[col] = P.at(0,col);
        }
      }
    }
  }

开发者ID:mm318，项目名称:mrg-cpp，代码行数:55，代码来源:podarray_meat.hpp

示例6: T

arma_hot
inline
typename T1::pod_type
arma_vec_norm_1(const Proxy<T1>& A)
  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::pod_type T;

  T acc = T(0);
    
  if(Proxy<T1>::prefer_at_accessor == false)
    {
    typename Proxy<T1>::ea_type P = A.get_ea();
    
    const uword N = A.get_n_elem();
    
    uword i,j;
    
    for(i=0, j=1; j<N; i+=2, j+=2)
      {
      acc += std::abs(P[i]);
      acc += std::abs(P[j]);
      }
    
    if(i < N)
      {
      acc += std::abs(P[i]);
      }
    }
  else
    {
    const uword n_rows = A.get_n_rows();
    const uword n_cols = A.get_n_cols();
    
    for(uword col=0; col<n_cols; ++col)
      {
      uword i,j;
      
      for(i=0, j=1; j<n_rows; i+=2, j+=2)
        {
        acc += std::abs(A.at(i,col));
        acc += std::abs(A.at(j,col));
        }
      
      if(i < n_rows)
        {
        acc += std::abs(A.at(i,col));
        }
      }
    }
    
  return acc;
  }

开发者ID:iirob，项目名称:wire，代码行数:54，代码来源:fn_norm.hpp

示例7: sqrt

arma_hot
inline
typename T1::pod_type
arma_vec_norm_2
(
    const Proxy<T1>& P,
    const typename arma_cx_only<typename T1::elem_type>::result* junk = 0
)
{
    arma_extra_debug_sigprint();
    arma_ignore(junk);

    typedef typename T1::pod_type T;

    T acc = T(0);

    if(Proxy<T1>::prefer_at_accessor == false)
    {
        typename Proxy<T1>::ea_type A = P.get_ea();

        const uword N = P.get_n_elem();

        for(uword i=0; i<N; ++i)
        {
            const T tmp = std::abs(A[i]);
            acc += tmp*tmp;
        }
    }
    else
    {
        const uword n_rows = P.get_n_rows();
        const uword n_cols = P.get_n_cols();

        if(n_rows == 1)
        {
            for(uword col=0; col<n_cols; ++col)
            {
                const T tmp = std::abs(P.at(0,col));
                acc += tmp*tmp;
            }
        }
        else
        {
            for(uword col=0; col<n_cols; ++col)
                for(uword row=0; row<n_rows; ++row)
                {
                    const T tmp = std::abs(P.at(row,col));
                    acc += tmp*tmp;
                }
        }
    }

    return std::sqrt(acc);
}

开发者ID:k8wells，项目名称:452p1，代码行数:54，代码来源:fn_norm.hpp

示例8: eT

arma_hot
inline
void
op_sum::apply_noalias_proxy(Mat<typename T1::elem_type>& out, const Proxy<T1>& P, const uword dim)
  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::elem_type eT;
  
  const uword P_n_rows = P.get_n_rows();
  const uword P_n_cols = P.get_n_cols();
  
  if(dim == 0)
    {
    out.set_size(1, P_n_cols);
    
    eT* out_mem = out.memptr();
    
    for(uword col=0; col < P_n_cols; ++col)
      {
      eT val1 = eT(0);
      eT val2 = eT(0);
      
      uword i,j;
      for(i=0, j=1; j < P_n_rows; i+=2, j+=2)
        {
        val1 += P.at(i,col);
        val2 += P.at(j,col);
        }
      
      if(i < P_n_rows)
        {
        val1 += P.at(i,col);
        }
      
      out_mem[col] = (val1 + val2);
      }
    }
  else
    {
    out.zeros(P_n_rows, 1);
    
    eT* out_mem = out.memptr();
    
    for(uword col=0; col < P_n_cols; ++col)
    for(uword row=0; row < P_n_rows; ++row)
      {
      out_mem[row] += P.at(row,col);
      }
    }
  }

开发者ID:PsycoTodd，项目名称:Armadillo_OpenCV_XCode_Framework，代码行数:51，代码来源:op_sum_meat.hpp

示例9: P

inline
arma_warn_unused
uword
accu(const mtOp<uword,T1,op_rel_noteq>& X)
  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::elem_type eT;
  
  const eT val = X.aux;
  
  const Proxy<T1> P(X.m);
  
  uword n_nonzero = 0;
    
  if(Proxy<T1>::prefer_at_accessor == false)
    {
    typedef typename Proxy<T1>::ea_type ea_type;
    
          ea_type A      = P.get_ea();
    const uword   n_elem = P.get_n_elem();
    
    for(uword i=0; i<n_elem; ++i)
      {
      if(A[i] != val) { ++n_nonzero; }
      }
    }
  else
    {
    const uword P_n_cols = P.get_n_cols();
    const uword P_n_rows = P.get_n_rows();
    
    if(P_n_rows == 1)
      {
      for(uword col=0; col < P_n_cols; ++col)
        {
        if(P.at(0,col) != val) { ++n_nonzero; }
        }
      }
    else
      {
      for(uword col=0; col < P_n_cols; ++col)
      for(uword row=0; row < P_n_rows; ++row)
        {
        if(P.at(row,col) != val) { ++n_nonzero; }
        }
      }
    }
  
  return n_nonzero;
  }

开发者ID:2003pro，项目名称:armadillo，代码行数:51，代码来源:fn_accu.hpp

示例10: pa

inline
arma_warn_unused
typename
enable_if2
  <(is_arma_type<T1>::value) && (is_arma_sparse_type<T2>::value) && (is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
   typename T1::elem_type
  >::result
dot
  (
  const Base<typename T1::elem_type, T1>& x,
  const SpBase<typename T2::elem_type, T2>& y
  )
  {
  arma_extra_debug_sigprint();

  const Proxy<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(), "dot()");

  typedef typename T1::elem_type eT;

  eT result = eT(0);

  typename SpProxy<T2>::const_iterator_type it = pb.begin();

  // prefer_at_accessor won't save us operations
  while(it.pos() < pb.get_n_nonzero())
    {
    result += (*it) * pa.at(it.row(), it.col());
    ++it;
    }

  return result;
  }

开发者ID:ELEN4002-Lab-Project-2012，项目名称:ELEN4002-Lab-Project，代码行数:35，代码来源:fn_dot.hpp

示例11: P

inline
bool
op_any::any_vec_helper(const Base<typename T1::elem_type, T1>& X)
  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::elem_type eT;
  
  const Proxy<T1> P(X.get_ref());
  
  const uword n_elem = P.get_n_elem();
  
  if(Proxy<T1>::prefer_at_accessor == false)
    {
    typename Proxy<T1>::ea_type Pea = P.get_ea();
    
    for(uword i=0; i<n_elem; ++i)
      {
      if(Pea[i] != eT(0))  { return true; }
      }
    }
  else
    {
    const uword n_rows = P.get_n_rows();
    const uword n_cols = P.get_n_cols();
    
    for(uword col=0; col < n_cols; ++col)
    for(uword row=0; row < n_rows; ++row)
      {
      if(P.at(row,col) != eT(0))  { return true; }
      }
    }
  
  return false;
  }

开发者ID:2003pro，项目名称:armadillo，代码行数:35，代码来源:op_any_meat.hpp

示例12:

inline
void
op_vectorise_row::apply_proxy(Mat<typename T1::elem_type>& out, const Proxy<T1>& P)
  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::elem_type eT;
  
  if(P.is_alias(out) == false)
    {
    out.set_size( 1, P.get_n_elem() );
    
    eT* outmem = out.memptr();
    
    const uword n_rows = P.get_n_rows();
    const uword n_cols = P.get_n_cols();
    
    for(uword row=0; row < n_rows; ++row)
      {
      uword i,j;
      
      for(i=0, j=1; j < n_cols; i+=2, j+=2)
        {
        const eT tmp_i = P.at(row,i);
        const eT tmp_j = P.at(row,j);
        
        *outmem = tmp_i; outmem++;
        *outmem = tmp_j; outmem++;
        }
      
      if(i < n_cols)
        {
        *outmem = P.at(row,i); outmem++;
        }
      }
    }
  else  // we have aliasing
    {
    arma_extra_debug_print("op_vectorise_row::apply(): aliasing detected");
    
    Mat<eT> tmp;
    
    op_vectorise_row::apply_proxy(tmp, P);
    
    out.steal_mem(tmp);
    }
  }

开发者ID:EmanueleCannizzaro，项目名称:armadillo，代码行数:47，代码来源:op_vectorise_meat.hpp

示例13: U

inline
void
op_diagmat2::apply(Mat<typename T1::elem_type>& out, const Proxy<T1>& P, const uword row_offset, const uword col_offset)
  {
  arma_extra_debug_sigprint();
  
  const uword n_rows = P.get_n_rows();
  const uword n_cols = P.get_n_cols();
  const uword n_elem = P.get_n_elem();
  
  if(n_elem == 0)  { out.reset(); return; }
  
  const bool P_is_vec = (T1::is_row) || (T1::is_col) || (n_rows == 1) || (n_cols == 1);
  
  if(P_is_vec)
    {
    const uword n_pad = (std::max)(row_offset, col_offset);
    
    out.zeros(n_elem + n_pad, n_elem + n_pad);
    
    if(Proxy<T1>::prefer_at_accessor == false)
      {
      typename Proxy<T1>::ea_type Pea = P.get_ea();
      
      for(uword i=0; i < n_elem; ++i)
        {
        out.at(row_offset + i, col_offset + i) = Pea[i];
        }
      }
    else
      {
      const unwrap<typename Proxy<T1>::stored_type> U(P.Q);
      
      const Proxy<typename unwrap<typename Proxy<T1>::stored_type>::stored_type> PP(U.M);
      
      op_diagmat2::apply(out, PP, row_offset, col_offset);
      }
    }
  else  // P represents a matrix 
    {
    arma_debug_check
      (
      ((row_offset > 0) && (row_offset >= n_rows)) || ((col_offset > 0) && (col_offset >= n_cols)),
      "diagmat(): requested diagonal out of bounds"
      );
    
    out.zeros(n_rows, n_cols);
    
    const uword N = (std::min)(n_rows - row_offset, n_cols - col_offset);
    
    for(uword i=0; i<N; ++i)
      {
      const uword row = i + row_offset;
      const uword col = i + col_offset;
      
      out.at(row,col) = P.at(row,col);
      }
    }
  }

开发者ID:KaimingOuyang，项目名称:HPC-K-Means，代码行数:59，代码来源:op_diagmat_meat.hpp

示例14:

inline
void
glue_max::apply(Mat< std::complex<T> >& out, const Proxy<T1>& PA, const Proxy<T2>& PB)
  {
  arma_extra_debug_sigprint();
  
  typedef typename std::complex<T> eT;
  
  const uword n_rows = PA.get_n_rows();
  const uword n_cols = PA.get_n_cols();
  
  arma_debug_assert_same_size(n_rows, n_cols, PB.get_n_rows(), PB.get_n_cols(), "max(): given matrices must have the same size");
  
  out.set_size(n_rows, n_cols);
  
  eT* out_mem = out.memptr();
  
  if( (Proxy<T1>::use_at == false) && (Proxy<T2>::use_at == false) )
    {
    typename Proxy<T1>::ea_type A = PA.get_ea();
    typename Proxy<T2>::ea_type B = PB.get_ea();
    
    const uword N = PA.get_n_elem();
    
    for(uword i=0; i<N; ++i)
      {
      const eT A_val = A[i];
      const eT B_val = B[i];
      
      out_mem[i] = ( std::abs(A_val) > std::abs(B_val) ) ? A_val : B_val;
      }
    }
  else
    {
    for(uword col=0; col < n_cols; ++col)
    for(uword row=0; row < n_rows; ++row)
      {
      const eT A_val = PA.at(row,col);
      const eT B_val = PB.at(row,col);
      
      *out_mem = ( std::abs(A_val) > std::abs(B_val) ) ? A_val : B_val;
      
      ++out_mem;
      }
    }
  }

开发者ID:EmanueleCannizzaro，项目名称:armadillo，代码行数:46，代码来源:glue_max_meat.hpp

示例15:

inline
void
op_clamp::apply_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P, const typename T1::elem_type min_val, const typename T1::elem_type max_val)
  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::elem_type eT;
  
  const uword n_rows = P.get_n_rows();
  const uword n_cols = P.get_n_cols();
  
  out.set_size(n_rows, n_cols);
  
  eT* out_mem = out.memptr();
  
  if(Proxy<T1>::use_at == false)
    {
    const uword N = P.get_n_elem();
    
    typename Proxy<T1>::ea_type A = P.get_ea();
    
    uword j;
    for(j=1; j<N; j+=2)
      {
      eT val_i = A[j-1];
      eT val_j = A[j  ];
      
      val_i = (val_i < min_val) ? min_val : ((val_i > max_val) ? max_val : val_i);
      val_j = (val_j < min_val) ? min_val : ((val_j > max_val) ? max_val : val_j);
      
      (*out_mem) = val_i;  out_mem++;
      (*out_mem) = val_j;  out_mem++;
      }
    
    const uword i = j-1;
    
    if(i < N)
      {
      eT val_i = A[i];
      
      val_i = (val_i < min_val) ? min_val : ((val_i > max_val) ? max_val : val_i);
      
      (*out_mem) = val_i;
      }
    }
  else
    {
    for(uword col=0; col<n_cols; ++col)
    for(uword row=0; row<n_rows; ++row)
      {
      eT val = P.at(row,col);
      
      val = (val < min_val) ? min_val : ((val > max_val) ? max_val : val);
      
      (*out_mem) = val;  out_mem++;
      }
    }
  }

开发者ID:EmanueleCannizzaro，项目名称:armadillo，代码行数:58，代码来源:op_clamp_meat.hpp

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