Constant z axis

From: Nd S (navdeep79_at_gmail.com)
Date: Wed Oct 08 2008 - 19:59:43 CDT

Hi all

I am doing NPT simulation.

My questions are:
1. I want to keep the z-axis constant, how I can do that.
2. Do I have to use "useGroupPressure" if some atoms in the box are fixed,
or I can use the default settings.

Thanks a lot,
Navdeep

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