Hi CHARMMers,

I am curious of making selections within a cylindrical region.

For example, if I want to find number of water molecules between -20 Angstrom and -15 Angstrom along the z-axis, it is easy to define z-range using "(prop Z .gt. -20) .and. (prop Z .lt. -15)", but how can I define the region on xy-plane?

Thanks in advance.

Best

Shane


Zhi (Shane) Yue
Department of Chemistry
University of Chicago