Hi Al,

you would need to go through the Python API:

python
rms=cmd.align("mob////CA","tar////CA", quiet=0)
print rms
python end

rms contains a tuple with various parameters related to the superposition. The 
first value in the tuple i.e. rms[0] should be the RMS value.

HTH 

        Carsten

-----Original Message-----
From: Albert Solernou [mailto:a.soler...@leeds.ac.uk] 
Sent: Wednesday, May 06, 2015 8:32 AM
To: pymol-users@lists.sourceforge.net
Subject: [PyMOL] RMS over a MD trajectory.

Hi,
I am trying to compute the RMS between a PDB file and a Gromacs trajectory. I 
can see that "align" does things correctly when:
  align trj, pdb1, mobile_state=1
i. e., when I align the first snapshot of the trajectory with the PDB file. I 
also understand that PyMOL does compute the RMS along the trajectory if I 
simply:
  align trj, pdb1
as it is told in:
  http://www.pymolwiki.org/index.php/Align
However, I am unable to get the list of RMS values printed out. How could I do 
that?

Thanks,
Albert

--
---------------------------------
   Dr Albert Solernou
   EPSRC Research Fellow,
   Department of Physics and Astronomy,
   University of Leeds
   Tel: +44 (0)1133 431451


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