From: Josh Vermaas (
Date: Mon Dec 16 2013 - 09:29:33 CST

Hi Hira,

VMD uses Angstroms. VMD's RMSF measurement is done on an atom-by atom
basis, so to get the RMSF for a residue, you'd need to do the weighting
-Josh Vermaas

On 12/14/2013 05:30 AM, HIRA BATOOL wrote:
> Hey,
> I want to know what is the unit of RMSF calculated by measure tcl
> script. Is it Angstrom or nm? Because I have written my own script for
> RMSF calculations. I just want to cross check my script's output with
> that of VMD's. I also want to know that can VMD calculate RMSF of
> every residue in a trajectory file on the basis of backbone (CA,N,C)?
> Thanks in advance.
> Hira Batool,
> Bioinformatician,
> Biosciences Department,
> COMSATS Institute of Information Technology, Islamabad, Pakistan.