Re: [gmx-users] gmx rmsdist: rmsmax vs. rmscmax

2015-03-16 Thread Alan Manning

Hi, thanks for the reply.

I now have another question regarding the the rmsdist tool: I'm confused 
why my rmsmax value seems so small. Right now I am simulating a box of 
water only. I'd like to get a matrix of all the atom-atom distances for 
a single frame in my simulation, so use the following command:


gmx rmsdist -f nvt.trr -s nvt.tpr -mean -nosumh -b 100 -e 100

However, this gives an rmsmax = 0.000345129, which is smaller than a 
water molecule, and Im not sure why.


I'm also curious why I need to supply a topology file if all I want to 
calculate is the interactomic distances. I'm likely misunderstanding 
this tool... Thanks in advance for the help.


Regards,
Alan Manning



On 03/16/15 04:24, Justin Lemkul wrote:



On 3/15/15 6:36 PM, Alan Manning wrote:

Hi

What is the difference between the rmsmax and rmscmax values
written to the
screen when running gmx rmsdist? Thanks.



rmscmax is scaled by dividing by the mean (sc for scaled,
presumably).  See calc_rmsd() in gmx_rmsdist.c

-Justin


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Re: [gmx-users] gmx rmsdist: rmsmax vs. rmscmax

2015-03-16 Thread Justin Lemkul



On 3/15/15 6:36 PM, Alan Manning wrote:

Hi

What is the difference between the rmsmax and rmscmax values written to the
screen when running gmx rmsdist? Thanks.



rmscmax is scaled by dividing by the mean (sc for scaled, presumably).  See 
calc_rmsd() in gmx_rmsdist.c


-Justin

--
==

Justin A. Lemkul, Ph.D.
Ruth L. Kirschstein NRSA Postdoctoral Fellow

Department of Pharmaceutical Sciences
School of Pharmacy
Health Sciences Facility II, Room 629
University of Maryland, Baltimore
20 Penn St.
Baltimore, MD 21201

jalem...@outerbanks.umaryland.edu | (410) 706-7441
http://mackerell.umaryland.edu/~jalemkul

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[gmx-users] gmx rmsdist: rmsmax vs. rmscmax

2015-03-15 Thread Alan Manning

Hi

What is the difference between the rmsmax and rmscmax values written 
to the screen when running gmx rmsdist? Thanks.


Regards,
Alan Manning
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