[gmx-users] potential energy

[rams rams]

Hi,
I run a regular MD on a peptide with several conformations. I want to
estimate the potential energy of each conformer. When I try using "g_energy"
with the option of "Potential" using the corresponding ".edr" file, I am
getting the average potential energy. But I am thinking that it is the
average potential energy of the system rather than the peptide alone
(correct me if I am wrong). There is no option with "g_energy" to use an
index file. Also I am not sure is there any way I can create the ".edr" file
for the peptide alone ?
Also let me know in case any other command would do the trick ?
Thanks in advance.
Ram.
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