Joel Ostblom

Hmm I don't really have a good idea of what is prefereable here, other than in terms of what I would find nice to type myself, which I think would...

Partly related https://github.com/altair-viz/altair/issues/695

My sense is that this issue should be handled by pandas and that it should not be possible to create a dataframe where two columns have the same name. Have...

Maybe we could introduce something like `df.flags.allows_duplicate_labels = False` ([docs](https://pandas.pydata.org/docs/user_guide/duplicates.html#disallowing-duplicate-labels)) in `santize_dataframe` which is where this error is raised, but I wonder why this isn't the default in pandas already...

Sorry for the delay in reviewing this @mattijn I had a go now but something is up with my environment, so I will try again tomorrow or during next week.

Thanks for reporting, the reason is that Vega-Lite's `title` parameter only takes a string, so the `title()` method (or `title=` parameter in version

Yes, this issue will be closed once a PR has been submitted to fix it. Feel free to create one if you have the time to get familiar with the...

Neat example! I think it would be great to include this (and it could maybe be a great example for temporal animation too once that is added to Vega-Lite). I...

It seems like although the tooltip encoding supports multiple fields there is no way to express this in a condition. This would need to be added in VL and the...

In terms of network drawings in altair, there used to be this project which seems to have halted now https://github.com/Zsailer/nx_altair. But maybe there is something that can still be used...