add marker styling for interactive plots

[sibeliu]

Could marker styling be added to interactive plots, to permit functionality like what is available on the static plot?

datamapplot.create_plot(cord19_data_map, cord19_labels, point_size=1, marker_type="s", marker_size_array=np.sqrt(citation_counts), force_matplotlib=True)

[lmcinnes]

The short answer is "no, not easily". To make the interactive plots I am leaning heavily on the power of deck.gl to do all the rendering of the scatterplot. This has many advantages, and makes things much easier for most tasks. However multiple marker types is not something that is supported in deck.gl's ScatterplotLayer, so it is not easy to add. It might be possible to do something with an IconLayer which supports more arbritrary markers, but the performance is significantly slower, and would eb an entirely different set of code for that case. I can't see supporting that at this time. Sorry.