[gmx-users] RMSD of extended md

[luigi.burgi at virgilio.it]

Dear Gromacs users,
i have a little problem with a rmsd calculation.
I 
have done an 11 ns simulation and calculated the rmsd with g_rms

g_rms 
-s topol.tpr -f traj1.xtc -dt 2

then i extende the simulation till 30 
ns

tpbconv -s -f -e -o tpxout.tpr -until 30000

and obtained the other 
trajectory traj2.xtc. 
Finally i calculated the rmsd for this part of 
the simulation:

g_rms -s tpxout.tpr -f traj2.xtc -dt 2

The problem is 
that when i put the two plots together the result is not contiuous.

Do 
i have to paste the two traj.xtc files together? and in that case which 
.tpr file should i use?

Thank you for any advice,
Luigi

--
Luigi 
Filippo Burgi
Computational Chemistry Group
Dept. of Physical Chemistry 
- Univ. of Milan