[gmx-users] viscosity and acflen in g_energy

[Mark Abraham]

Vitaly V. Chaban wrote:
> Hi,
> 
> When using g_energy to calculate viscosity ("g_energy -vis"), in
> enecorr.xvg the ACF of stress tensor is output. How can one specify
> the "acflen" of this ACF?
> I try the key "g_energy -vis -acflen XXX" but the length of the ACF is
> still equal to the half of the trajectory length.

If you read g_energy -h, you will need to specify the ACF length in a 
particular way. If you'd given us your actual command line and some 
information about your trajectory, you might have gotten a definitive 
answer... as it is, we can only assume you made an error of some sort! :-)

Mark