Jody Klymak

The end goal, I think, is ```python fb = ax.fill_between(x, y1, y2, where=where) ... fb.set_data(newx, newy1, newy2, where=newwhere) ``` or ```python fb = ax.fill_between(y, x1, x2, where=where) ... fb.set_data(newy, newx1,...

At a quick glance, this looks great, but others should chip in before polishing up. Perhaps @timhoffm and @antzer as API and tech leads? Can I suggest you add an...

> This is a fundamental paradigm shift from plotting functions creating simple generic geometric Artists I'm not sure this really is a paradigm shift. We have other compound artists, `Line2D`...

I agree that this does not fit well into the Quick-Start guide, and should probably be moved to Users Guide under Artitsts.

> Compared to other visualization frameworks, matplotlib has very limited capability for interacting with the plot. What other general scientific visualization frameworks are you referring to here?

For sure the state of various matplotlib/d3 based projects indicates that leveraging d3 is hard to get the abstractions correct. D3 uses SVG and canvas, so perhaps using those primitives...

> "here are the out of the box interactive things we provide" doc https://matplotlib.org/stable/users/explain/figure/interactive.html#

> That doc does not cover things like sharex/sharey or auto update colorbar scroll or the data cursor Please open an issue or issues.

> It will be very difficult to get full, nicely integrated interactivity with Matplotlib's current design, I'm still curious what defines "nicely integrated interactivity" or if there is a package...

> but Matplotlib looks and acts like something from the 1990s with only very basic operations supported, I don't think their GUI elements look particularly better than ipympl's. I agree...