Hello,
I've a sparse matrix and want to select just some of the rows and columns to solve a matrix equation with it or in other words I want to delete some rows / columns and use the remaining matrix to solve a matrix equation.
Unfortunately I didn't find a function or method in eigen3 that supports this, is it possible to achieve this anyway?
Thanks,
matse

currently you have to manually copy the column/vectors you want, unless they are sequentially stored in which case there are methods for that (innerVectors).