stat_quadrant_summarize()

[Pedro J. Aphalo]

Define a summarize stat that applies a fun.y after splitting the data according quadrants. This would be a companion to stat_quadrant_counts().

[Pedro J. Aphalo]

Although rather trivial to implement and adding generality to the interface, would it be useful at all? What else other than counts would one need? If implemented, I think functions taking both x and y values would be most useful, but then supporting this in the implementation would no longer be trivial…

Please, vote this issue up if you would find it useful.

[Pedro J. Aphalo]

Waiting for votes or confirmation of usefulness.