Hexbin plot component

[d-callan]

Discussed in dataviz meeting, would like a hexbin plot. This would give us an alternative to the scatter plot that can support large data.

Could look here for examples: https://r-graph-gallery.com/100-high-density-scatterplot-with-binning.html

I'm inclined to not implementing new components in plotly, not that I'm even sure we could for this. Think we should seriously consider visx here.

[bobular]

My understanding is that the back end will need to do the hexagonal binning and the the front end is likely to be a glorified scatterplot (with hexagonal glyphs). Presumably there is R code available already?

Agree that this would be a good opportunity to move away from Plotly.

[bobular]

Also, I presume no overlay possible for hexbin?

Overlay in regular scatterplots is problematic too however. The order in which series get rendered on screen can change the entire picture, even when we have high transparency, see example in #419 (comment)