[gmx-users] units of eigenvalues of mass-weighted covariance matrix

Mark Abraham Mark.Abraham at anu.edu.au
Wed Jun 10 04:16:16 CEST 2009

Wang Qin wrote:
> Dear all,
>      I am confused on the units of the eigenvalues calculated from 
> g_covar of mass-weighted covariance matrix. From the output, it says the 
> unit is  "(nm\S2\N)" but from my understanding, it is supposed to be kg/m2.

Various of the GROMACS analysis tools don't write the correct units in 
.xvg output. This looks like such a case. There's a section early in the 
manual that describes the GROMACS unit conventions, from which you
should be able to deduce what the units are.


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