AxenMatrixLib — A library for working with matrices in C++

AxenMatrixLib is a compact and test-covered library for working with matrices in C++. It implements core linear algebra operations, including arithmetic, determinant calculation, transposition, inverse matrix, and other matrix operations. The project is developed as a pet project with a focus on clean code, test coverage, and ease of integration.

Features

• Matrix creation and copying
• Arithmetic operations: addition, subtraction, multiplication by scalars and matrices.
• Flexible size handling: ability to dynamically change the number of rows and columns.
• Matrix comparison: accounting for computational precision errors.
• Determinant calculation: using the Laplace algorithm.
• Inverse matrix
• Transposition
• Calculation of the matrix of cofactors (complements)
• Boundary case checking and exception throwing on errors
• Full unit test coverage
• Integration and build by CMake

Ideas for project improvement

1. Make the matrix class templated to support types that behave like numbers.
2. Implement a more efficient determinant calculation algorithm, such as Gaussian elimination.
3. Add support for atomic operations for thread safety.
4. Implement iterators for the matrix class.
5. Create adapters for integration with STL containers.

Quick Start

Requirements

• C++20 compatible compiler (GCC, Clang, MSVC)
• CMake 3.21+
• GoogleTest (automatically detected via find_package)

Build

git clone https://github.com/Steindvart/AxenMatrixLib.git
cd AxenMatrixLib
mkdir build && cd build
cmake ..
make

Running Tests

ctest --output-on-failure
# or directly
./src/MatrixLibTests/MatrixLibTests

Usage

Add MatrixLib as a submodule or include it via CMake.

add_subdirectory(MatrixLib)
target_link_libraries(YourTarget PRIVATE MatrixLib)

Example Usage

#include <axen/MatrixLib/Matrix.h>

int main() {
    Matrix a(3, 3);
    Matrix b(3, 3);
    // ... fill a and b ...
    Matrix c = a + b;
    Matrix d = a * b;
    double determinantA = a.Determinant();
    Matrix inverseA = a.Inverse();
}