Matrix is a single-header C++ matrix library that offers a clean interface for working with matrices in your applications. Notably, this library comes with LAPACK support to provide efficient linear algebra operations, all within a single header file for your convenience.
To use the Matrix class in your C++ project, simply include the single header file:
#include "matrix.h"If you want to enable BLAS and LAPACK support, you can use the following command after installing LAPACK:
make blas=1Creating a matrix is straightforward:
Matrix<int, 2, 3> matrix; // Creates a 2x3 matrix of integers, initialized to 0.You can initialize matrices with data using initializer lists:
Matrix<double, 2, 2> matrix = {1.0, 2.0, 3.0, 4.0};Perform basic operations like addition, subtraction, unary minus, multiplication and inversion:
Matrix<double, 2, 2> sum = matrix1 + matrix2; // Matrix addition
Matrix<double, 2, 2> diff = matrix2 - matrix1; // Matrix subtraction
Matrix<double, 2, 2> negated = -matrix1; // Unary minus
Matrix<double, 2, 2> scaled = matrix1 * 2; // Scalar multiplication
Matrix<double, 2, 2> product = matrix1 * matrix2; // Matrix multiplication
Matrix<double, 2, 2> inverse = matrix1.inv(); // Matrix inversion
Matrix<double, 2, 2> transposed = matrix1.t() // Matrix TranspositionAccess matrix elements using parentheses or data() for const objects:
double element = matrix(0, 1); // Accesses the element at row 0, column 1
const double* dataPtr = matrix.data();
double thirdElement = dataPtr[2]; // Accesses the third elementPrint matrices neatly using the overloaded << operator:
std::cout << "Matrix:\n" << matrix << std::endl;