Armadillo differs from other linear algebra libraries like Eigen primarily in its design philosophy, syntax, and performance. Armadillo focuses on providing a simple, intuitive API with MATLAB-like syntax, making it easier for developers familiar with MATLAB to transition. In contrast, Eigen uses expression templates, resulting in more complex code but potentially better compile-time optimizations.
Armadillo’s use of LAPACK and BLAS libraries allows for efficient low-level operations, while Eigen relies on its own implementations. This can lead to differences in performance depending on the specific problem being solved.
A developer might choose Armadillo over alternatives due to its simplicity, ease of use, and compatibility with existing MATLAB code. Additionally, if a project requires interfacing with C or Fortran code, Armadillo’s reliance on LAPACK and BLAS may be advantageous.
