NDArrayAdvanced

class numpy::NDArrayAdvanced

numpy C++ class.

Example

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

// Use NDArrayAdvanced
NDArrayAdvanced obj;
// ... operations ...

Constructors

Signature	Location	Example
NDArrayAdvanced(const NDArray<T>&array)	NP_NDARRAY_ADVANCED.H:23
NDArrayAdvanced(NDArray<T>&&array)	NP_NDARRAY_ADVANCED.H:24

Operators

Signature	Return Type	Location	Example
T operator[](ssize_tindex)	T	NP_NDARRAY_ADVANCED.H:32
IndexedArrayResult<T> operator[](const IndexExpr &expr)	IndexedArrayResult<T>	NP_NDARRAY_ADVANCED.H:45
IndexedArrayResult<T> operator[](const IndexExpr &expr)	IndexedArrayResult<T>	NP_NDARRAY_ADVANCED.H:49
IndexedArrayResult<T> operator[](const Slice &slice)	IndexedArrayResult<T>	NP_NDARRAY_ADVANCED.H:54
NDArray<T> operator[](const NDArray<bool\_>&mask)	NDArray<T>	NP_NDARRAY_ADVANCED.H:61
NDArray<T> operator[](const NDArray<size_t>&indices)	NDArray<T>	NP_NDARRAY_ADVANCED.H:66
NDArray<T> operator[](const NDArray<int32_t>&indices)	NDArray<T>	NP_NDARRAY_ADVANCED.H:77

Indexing / Selection

Signature	Return Type	Location	Example
auto getitem(Args...args)	auto	NP_NDARRAY_ADVANCED.H:95
void put(const NDArray<size_t>&indices, const NDArray<T>&values)	void	NP_NDARRAY_ADVANCED.H:133	View

Math Operations

Signature	Return Type	Location	Example
void add_to_expr(IndexExpr &expr, ssize_tidx)	void	NP_NDARRAY_ADVANCED.H:187
void add_to_expr(IndexExpr &expr, const Slice &slice)	void	NP_NDARRAY_ADVANCED.H:191
void add_to_expr(IndexExpr &expr, const NDArray<size_t>&array)	void	NP_NDARRAY_ADVANCED.H:195
void add_to_expr(IndexExpr &expr, const NDArray<bool\_>&array)	void	NP_NDARRAY_ADVANCED.H:199
void add_to_expr(IndexExpr &expr, const Ellipsis &e)	void	NP_NDARRAY_ADVANCED.H:203
void add_to_expr(IndexExpr &expr, const NewAxis &n)	void	NP_NDARRAY_ADVANCED.H:207
void add_to_expr(IndexExpr &expr, const Colon &c)	void	NP_NDARRAY_ADVANCED.H:211

Other Methods

Signature	Return Type	Location	Example
void assign_values(NDArray<T>&target, const NDArray<T>&source)	void	NP_NDARRAY_ADVANCED.H:216
void build_index_expr(IndexExpr &expr, Firstfirst, Rest...rest)	void	NP_NDARRAY_ADVANCED.H:179
void setitem(const NDArray<T>&values, Args...args)	void	NP_NDARRAY_ADVANCED.H:103

Code Examples

The following examples are extracted from the test suite.

put (np_test_5_all.cpp:4389)

      numpy::NDArray<size_t> indices({ 3 });
      indices.setElementAt({ 0 }, 5);  // Last position
      indices.setElementAt({ 1 }, 2);  // Middle position
      indices.setElementAt({ 2 }, 0);  // First position

      numpy::NDArray<int32_t> values({ 3 });
      values.setElementAt({ 0 }, 100);
      values.setElementAt({ 1 }, 200);
      values.setElementAt({ 2 }, 300);

      numpy::put(arr, indices, values);

      // Check modified values
      if (arr.getElementAt({ 0 }) != 300 || arr.getElementAt({ 2 }) != 200 || arr.getElementAt({ 5 }) != 100) {
        std::cout << "  [FAIL] : in np_test_put_basic() : Values not correctly placed";
        throw std::runtime_error("Test failed");
      }

      // Check unmodified values
      if (arr.getElementAt({ 1 }) != 10 || arr.getElementAt({ 3 }) != 30 || arr.getElementAt({ 4 }) != 40) {
        std::cout << "  [FAIL] : in np_test_put_basic() : Unmodified values changed";