Interactive iterative inspection

[andportnoy]

A user should be able to quickly inspect outlier epochs/subjects, possibly using visual tools, i.e. point and click from a plot. Matplotlib or Altair could be used to that end.

MPL examples:

• https://matplotlib.org/gallery/index.html#event-handling

Altair examples:

• https://altair-viz.github.io/gallery/interactive_cross_highlight.html
• https://altair-viz.github.io/gallery/selection_histogram.html