Dataset

class numpy::Dataset

numpy C++ class.

Example

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

// Use Dataset
Dataset obj;
// ... operations ...

Constructors

Signature	Location	Example
Dataset(const std::map<std::string, DataVarVariant>& data_vars, const std::map<std::string, Coordinate>& coords =	df_xarray.h:466

Array Creation

Signature	Return Type	Location	Example
bool empty() const	bool	df_xarray.h:537	View

Indexing / Selection

Signature	Return Type	Location	Example
const std::map<std::string, std::string>& attrs() const	const std::map<std::string, std::string>&	df_xarray.h:502
std::map<std::string, std::string>& attrs()	std::map<std::string, std::string>&	df_xarray.h:503

Statistics

Signature	Return Type	Location	Example
std::vector<std::string> var_names() const	std::vector<std::string>	df_xarray.h:513

I/O

Signature	Return Type	Location	Example
std::string to_string() const	std::string	df_xarray.h:624	View

Other Methods

Signature	Return Type	Location	Example
void compute_dims()	void	df_xarray.h:717
const Coordinate& coord(const std::string& name) const	const Coordinate&	df_xarray.h:592
const std::map<std::string, Coordinate>& coords() const	const std::map<std::string, Coordinate>&	df_xarray.h:491
std::map<std::string, Coordinate>& coords()	std::map<std::string, Coordinate>&	df_xarray.h:492
const std::map<std::string, DataVarVariant>& data_vars() const	const std::map<std::string, DataVarVariant>&	df_xarray.h:485
std::map<std::string, DataVarVariant>& data_vars()	std::map<std::string, DataVarVariant>&	df_xarray.h:486
\* Call this after directly modifying data_vars() to update	* Call this after directly modifying	df_xarray.h:610
std::vector<std::string> dim_names() const	std::vector<std::string>	df_xarray.h:525
const std::map<std::string, size_t>& dims() const	const std::map<std::string, size_t>&	df_xarray.h:497
void drop_var(const std::string& name)	void	df_xarray.h:573
bool has_coord(const std::string& name) const	bool	df_xarray.h:585
bool has_var(const std::string& name) const	bool	df_xarray.h:546
size_t nvars() const	size_t	df_xarray.h:508
void recompute_dims()	void	df_xarray.h:613
void set_coord(const std::string& name, const Coordinate& coord)	void	df_xarray.h:603
void set_var(const std::string& name, const DataArray<T>& var)	void	df_xarray.h:565

Code Examples

The following examples are extracted from the test suite.

empty (np_test_1_all.cpp:6316)

}

void test_data_generator_emptyBenchmarkSorting() {
    std::cout << "========= test_data_generator_empty =======================";

    DataGenerator<int> gen(42);

    // Test empty data generation
    std::vector<int> data = gen.generate(0, DataPattern::RANDOM);

    if (!(data.empty())) {
        std::string description = std::string("test_data_generator_emptyBenchmarkSorting():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(data.empty())";
        std::cout << std::string("[FAIL] ") + description << std::endl;
        throw std::runtime_error(description);
    }

    // std::cout << "Empty data generation test passed" << std::endl;

    std::cout << " -> tests passed" << std::endl;
}

to_string (np_test_1_all.cpp:454)

    // Modify through different views
    view1.setElementAt({0, 0}, 100);
    view2.setElementAt({2, 1}, 200);  // This is (1, 2) in original
    view3.setElementAt({0, 0}, 300);  // This is (1, 1) in original

    // std::cout << "After modifications through multiple views:" << std::endl;
    //original.printArray();

    // Verify all changes are reflected
    if (!(original.getElementAt({0, 0}) == 100)) {
        std::string description = std::string("testAdvancedViewLifecycle():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(original.getElementAt({0, 0}) == 100)";
        std::cout << std::string("[FAIL] ") + description << std::endl;
        throw std::runtime_error(description);
    }
    if (!(original.getElementAt({1, 2}) == 200)) {
        std::string description = std::string("testAdvancedViewLifecycle():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(original.getElementAt({1, 2}) == 200)";
        std::cout << std::string("[FAIL] ") + description << std::endl;
        throw std::runtime_error(description);
    }
    if (!(original.getElementAt({1, 1}) == 300)) {
        std::string description = std::string("testAdvancedViewLifecycle():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(original.getElementAt({1, 1}) == 300)";