Mattijn van Hoek

If i reverse engineer my mind, I think I found it in the heatmap transform docs: https://vega.github.io/vega/docs/transforms/heatmap/ > A color value or expression for setting each individual pixel’s color. If...

As was mentioned in this post: https://github.com/vega/altair/issues/891#issuecomment-1458304756, native support for Zarr file format, multiscale (pyramid), within Vega would be great too.

Or here https://altair-viz.github.io/user_guide/interactions.html#conditions-filters

Thank you very much for making this Pull Request. That is very much appreciated! This PR introduces a new dependency on [narwhals](https://github.com/narwhals-dev/narwhals). Narwhals is described as a lightweight and extensible...

Really awesome to see you were able to remove numpy as a hard dependency too! Its great to see this happening! A few more comments while you might still have...

A bit off topic, but regarding `polars.DataFrame.plot` functionality: (1) you also might learn some lessons from this archived repo: https://github.com/altair-viz/pdvega, (2) there is also some work underway to extend the...

@dangotbanned, I totally agree agree that you have been going very deep in the altair code recently! Which is very much appreciated. If being a maintainer would make it more...

Thanks for the changes @MarcoGorelli! I still have one question which I cannot really understand. Given the following example: ```python import datetime import polars as pl import pyarrow as pa...

Yes for type `nw.Datetime` it works correctly. The question I have is about the `nw.Date` type. One change with your latest comment compared to my comment [above](https://github.com/vega/altair/pull/3452#issuecomment-2228062681) is that for...

Interesting... Let me see if I can find something on this at the pyarrow library. Thanks!