In the graph crossfilter example from https://plot.ly/dash/getting-started-part-2, we can see that we have access to hover data, click data, and selection data.
What these three data elements have in common is that they are tied to points in the graph. This means that if you select a region that has no points, then selectData will be empty.
Is there a way to capture the region selected, whether or not points are contained within? The Box Select corner coordinates would be nice to have. For the Lasso select, this would be a little more complicated.
Is this something that Plotly already supports?
I want to be able to select an arbitrary subset of points, and then display statistics about these points, such as a histogram. There is a nice dashboard example out there using a dataset called “flights and conflicts 2008-2009” or something like that. But here “dashboard” means Plotly dashboard, not Dash dashboard.