Hi Ken,

I did a bit of analysis of A2.0 on a magnitude-by-magnitude basis,
showing how many stars fall in half-magnitude bins, both by zone and
in total, for R, B, and "V-like" bands:

http://www.projectpluto.com/a2.htm#filtered

Sounds as if this is what you're looking for? If not, please
explain a bit... it's possible I've got some applicable code sitting
around that would be useful to you.

-- Bill