Nalgebra support

[j-h-stevens]

Description

Convert Polars DataFrame to Nalgebra's DMatrix; similar functionality as "to_ndarray".

[orlp]

I don't think we want to add this at this point. You can write the conversion from ndarray to DMatrix yourself, or use a crate like https://lib.rs/crates/nshare (haven't tested it, ndarray recommends it).

[orlp]

When the Rust tabular data/tensor data community agrees on an interchange format / common library we'll be more than happy to support it, but I don't feel like adding a different export and conditional compilation / features for every new matrix / tensor library under the sun.

[LockedThread]

When the Rust tabular data/tensor data community agrees on an interchange format / common library we'll be more than happy to support it, but I don't feel like adding a different export and conditional compilation / features for every new matrix / tensor library under the sun.

ndarray is having some maintainership turmoil right now. My company has moved to nalgebra because of it's vibrant community and amazing documentation.

[akern40]

@LockedThread I'm sorry to hear that ndarray wasn't fulfilling your company's needs! I'd really like to hear some more about what made you switch over, what features were missing, what documentation was needed, etc. This isn't the place to do that, but if you head to that issue you linked to (rust-ndarray/ndarray#1272) and scroll to the bottom, I'm soliciting feedback from the community. Would love to have your participation.

[LockedThread]

@LockedThread I'm sorry to hear that ndarray wasn't fulfilling your company's needs! I'd really like to hear some more about what made you switch over, what features were missing, what documentation was needed, etc. This isn't the place to do that, but if you head to that issue you linked to (rust-ndarray/ndarray#1272) and scroll to the bottom, I'm soliciting feedback from the community. Would love to have your participation.

Thank you for reaching out. I put a comment with our major reasons in the other chat.