Jake Vanderplas

Over the past couple days I pushed a number of big updates to the package. Take a look at [This Example](https://github.com/altair-viz/altair-transform#example-pre-aggregating-large-datasets) in the README which shows how the package can...

Looks good. One concern I have is that the names of matplotlib colormaps do not correspond to the names of vega schemes, but there's not really any easy way around...

> can we for all those params support both strings and alt objects? I'd lean toward no. I think the main benefit of this API is the ability to create...

Let's go ahead and apply colormap directly to scheme as here. Not a perfect solution, but I think it's the best thing that can be done easily at this point....

Sure, we could implement those plots here.

What kind of chart are you asking about?