I plan to improve that, but will need to figure out the design (perhaps with something from Eigen). There is <https://metacpan.org/pod/PDL::CCS https://metacpan

I plan to improve that, but will need to figure out the design (perhaps with something from Eigen). There is <https://metacpan.org/pod/PDL::CCS https://metacpan.org/pod/PDL::CCS>, but it is not a real full PDL ndarray and is actually a wrapper around the PDL API.