[gmx-users] gyration radius

[Ran Friedman]

Hello,

I'm trying to understand the relation between the total radius of 
gyration and its components. Searching to the mailing list, I found     
that Rg = sqrt (Rx^2 + Ry^2 + Rz^2), see 
http://www.gromacs.org/pipermail/gmx-users/2003-October/007376.html

But what I got was:

set     average              stddev
SS1   1.744821e+00   2.028432e-02   (Rg)
SS2   1.195420e+00   1.366429e-02   (Rx)
SS3   1.485673e+00   2.606876e-02   (Ry)
SS4   1.565914e+00   2.048274e-02   (Rz)

which means:
Rg = sqrt ((Rx^2 + Ry^2 + Rz^2) * 0.5)

What's wrong?

Thanks,
Ran.

-- 
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Ran Friedman
Laser Laboratory for Fast Reactions in Biology
Department of Biochemistry
Faculty of Life Sciences
Tel-Aviv University
Tel. +972-3-6409824
Fax. +972-3-6409875
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