Eigen library

[sam80]

Hello everyone,
I wonder why people say Eigen library support 2D arrays. I did not see any problem to calculate eigenvalue of 4*4 matrix.

[mbozzi]

Eigen definitely supports matrices, even the 2d ones, since it's a linear algebra library. :)

Here's the documentation you're looking for.
https://eigen.tuxfamily.org/dox/classEigen_1_1MatrixBase.html#a0ffa061371b1bd1b9f14ecef94b4502e