Date: Thu, 31 Oct 2002 07:21:28 -0800
From: "David A. Case"
Subject: Re: time correlation function

On Fri, Oct 25, 2002, Bimo Ario Tejo wrote:
>
>
> 1. What does mean with Rrigid and Rave in "corelation" command in ptraj?
> 2. I know C(t) is correlation as function of time, but what does mean with
> P2(t) and R(t)?
>

If I remember correctly, P2(t) is <P2(v(0).v(t))>, where P2 is the Legendre
polynomial of order 2, and "v" is the vector you have chosen.

R(t) is <b^3(0)b^3(t)>, where "b" is the length of the vector you have chosen.

C(t) is <P2(v(0).v(t))/(b^3(0)b^3(t))>

..hope this helps...dac