Hi all,

Is there a way to tell Eigen that a specific matrix only has a block that is non-zero?
Like, for example, the triangular view - but "block"-view.

So one might do:

Code: Select all

// Ex1:
Q * A.blockview<form_x, from_y, to_x, to_y>() * R

// Ex2:
Q * A.blockview<size_x, size_y>(from_x, form_y) * R


I'm looking to generate optimized code that does not use all the zeros in a matrix.
Thanks for the assistance!

Best
Emil

Nope, you must use A.block(...) and pick respective blocks of Q and R. by hand.

I see.
Is this a planned feature, or is there somewhere I can request it as an official feature?
When using Eigen in embedded systems this often comes up, and is very good when to automatically generate algorithms at compile time.