miniNumpy

miniNumpy is a small NumPy-like array library written in C++.

The goal of this project is mainly to practice modern C++ concepts such as classes, operator overloading, header-only libraries, CMake, testing, and Python bindings (pybind11).

Current features

• 1D arrays with Array1D
• 2D arrays with Array2D
• Elementwise arithmetic
• Scalar arithmetic
• Basic reductions: sum, mean, min, max
• Factory functions such as zeros, ones, and arange
• Basic reshape, flatten, transpose, and matrix multiplication
• Simple tests with assert
• Basic Python bindings using pybind11

Example C++ usage

#include <iostream>

#include "miniNumpy/functions.hpp"

int main() {
    auto a = mnp::arange(0, 5);
    auto b = mnp::ones(5);

    std::cout << a << std::endl;
    std::cout << a + b << std::endl;
    std::cout << a.mean() << std::endl;

    auto x = mnp::reshape(a, 1, 5);
    std::cout << x << std::endl;

    return 0;
}

Example Python usage

import miniNumpy as mnp

a = mnp.arange(0, 5)

print(a)
print(a.sum())
print(a.mean())

a[1] = 10
print(a)

Build

mkdir build
cd build
cmake ..
cmake --build .
ctest