Append column to matrix, using Eigen library

Question

It\'s quite a simple task, but I was not able to find an answer to it:

Using the Eigen library, suppose I have Matrix2Xd mat and Vector2d vec

Answer 1

You can use conservativeResize for that purpose:

mat.conservativeResize(mat.rows(), mat.cols()+1);
mat.col(mat.cols()-1) = vec;