C++ (Cpp) numpy_expr_to_ndarray示例

示例#1

文件： take.hpp 项目： OnlySang/pythran

 typename types::numpy_expr_to_ndarray<F>::type take(types::ndarray<T,N> const & expr, F const& indices)
 {
     typename types::numpy_expr_to_ndarray<F>::type out = asarray(indices);
     auto expr_iter = expr.fbegin();
     for(auto out_iter = out.fbegin(), out_end = out.fend(); out_iter != out_end; ++out_iter)
         *out_iter = *(expr_iter + *out_iter);
     return out;
 }

示例#2

文件： tile.hpp 项目： Pikalchemist/pythran

 typename types::numpy_expr_to_ndarray<E>::type tile(E const& expr, int reps)
 {
     size_t n = expr.flat_size();
     typename types::numpy_expr_to_ndarray<E>::type out(types::array<long, 1>{{long(n * reps)}}, __builtin__::None);
     auto out_iter = out.fbegin();
     _tile(expr.begin(), expr.end(), out_iter, utils::int_<types::numpy_expr_to_ndarray<E>::N>());
     for(int i = 1; i< reps; ++i)
         out_iter = std::copy(out.fbegin(), out.fbegin() + n, out_iter);
     return out;
 }

示例#3

文件： nan_to_num.hpp 项目： yuancheng2013/pythran

 typename types::numpy_expr_to_ndarray<E>::type
 nan_to_num(E const& expr) {
     typename types::numpy_expr_to_ndarray<E>::type out(expr.shape, __builtin__::None);
     for(long i=0, n=expr.size(); i<n; ++i) {
         auto v = expr.at(i);
         if(nt2::is_inf(v) and nt2::is_positive(v))
             out.at(i) = std::numeric_limits<typename types::numpy_expr_to_ndarray<E>::type::dtype>::max();
         else if(nt2::is_inf(v) and nt2::is_negative(v))
             out.at(i) = -std::numeric_limits<typename types::numpy_expr_to_ndarray<E>::type::dtype>::max();
         else if(nt2::is_nan(v))
             out.at(i) = 0;
         else out.at(i) = v;
     }
     return out;
 }

示例#4

文件： nan_to_num.hpp 项目： baoboa/pythran

typename types::numpy_expr_to_ndarray<E>::type
nan_to_num(E const& expr) {
    typename types::numpy_expr_to_ndarray<E>::type out(expr.shape, __builtin__::None);
    _nan_to_num(expr.begin(), expr.end(), out.begin(), utils::int_<types::numpy_expr_to_ndarray<E>::N>());
    return out;
}