Jake Vanderplas

Good point... my feeling is that bindings in Altair 2 are still pretty immature (controlling their appearance/title is not easy, and it's not possible to set a starting value). There's...

I'd be open to making this API a superset of pandas... particularly for the ``scatter`` function, which is the one that maps really well onto the grammar of vega-lite. Maybe...

In master, you can do this by layering, but that's not very convenient at the moment. It would be something like: ```python ax = data.vgplot(x='x', y='y') # draw a line...

Are you working in altair or in pdvega?

Maybe you could comment on https://github.com/altair-viz/altair/issues/1124 with the problem you're having with the solution there.

done in 0936277; leaving this issue open to remind me to add it to the docs.

Arrow support in Vega/Vega-Lite is an open issue: https://github.com/vega/vega/issues/1300. Once it's available there, we will work to make it available in Altair

It would first have to be supported by Vega-Lite.

Vega-Lite's schema does not yet allow the arrow format: https://github.com/vega/schema/blob/master/vega-lite/v4.11.0.json#L5526-L5541

Looks great! A PR in the *case studies* category would be perfect. Would a quantitative x-encoding lead to better axis labels, perhaps with a label format to preven commas added...