IndexedArray

class numpy::IndexedArray

numpy C++ class.

Example

#include <numpy/np_ndarray.h>
using namespace numpy;

// Use IndexedArray
IndexedArray obj;
// ... operations ...

Constructors

Signature	Location	Example
IndexedArray(const NDArray<T>\*source, const IndexExpr &expr)	NP_ADVANCED_INDEXING.H:59

Linear Algebra

Signature	Return Type	Location	Example
size_t normalize_array_index(IndexTypeidx, size_tdim_size)	size_t	NP_ADVANCED_INDEXING.H:223

Type Handling

Signature	Return Type	Location	Example
void copy_with_slices(NDArray<T>&result, const std::vector<Slice>&slices, const std::vector<ssize_t>&fixed_indices, const std::vector<size_t>&fixed_dims, const std::vector<size_t>&newaxis_positions)	void	NP_ADVANCED_INDEXING.H:149

Other Methods

Signature	Return Type	Location	Example
void apply_boolean_indexing(NDArray<T>&result, const std::vector<NDArray<bool\_>\*>&bool_masks)	void	NP_ADVANCED_INDEXING.H:197
void apply_fancy_indexing(NDArray<T>&result, const std::vector<std::variant<ssize_t,Slice,NDArray<size_t>,NDArray<int32_t>,NDArray<int64_t>>>&indices)	void	NP_ADVANCED_INDEXING.H:233
void apply_mixed_basic_indexing(NDArray<T>&result, const std::vector<std::variant<ssize_t,Slice,NDArray<size_t>,NDArray<int32_t>,NDArray<int64_t>>>&indices)	void	NP_ADVANCED_INDEXING.H:324
void materialize_advanced(NDArray<T>&result)	void	NP_ADVANCED_INDEXING.H:117
void materialize_basic(NDArray<T>&result)	void	NP_ADVANCED_INDEXING.H:81
const std::vector<size_t>& shape()	const std::vector<size_t>&	NP_ADVANCED_INDEXING.H:64	View

Code Examples

The following examples are extracted from the test suite.

shape (np_test_1_all.cpp:3751)

    }

    for (size_t j = 0; j < 3; ++j) {
        arr3.setElementAt({0, j}, static_cast<double>((j + 1) * 100));  // [100, 200, 300]
    }

    // Broadcast all arrays together
    std::vector<NDArray<double>> arrays = {arr1, arr2, arr3};
    auto broadcasted = broadcast_arrays(arrays);

    // All should have shape (2, 3)
    for (const auto& arr : broadcasted) {
        if (!((arr.getShape() == std::vector<size_t>{2, 3}))) {
            std::string description = std::string("test_broadcast_arrays():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !((arr.getShape() == std::vector<size_t>{2, 3}))";
            std::cout << std::string("[FAIL] ") + description << std::endl;
            throw std::runtime_error(description);
        }
    }

    // Check values
    if (!(broadcasted[0].getElementAt({0, 1}) == 2.0)) {