Re: [gmx-users] script

2019-03-07 Thread Pedro Deira
You could use a sed command in your script to replace that line, something
like
sed "s/original expression/new expression/" filename -i
But it depends a lot on how your mdp file is formatted in terms of spaces
and tabs.

Hope it helps,


On Thu, 7 Mar 2019, 12:14 Amin Rouy,  wrote:

> Hi
>
> I would like to change the temperature of the simulation (NPT.mdp) inside
> my bash script, any one has idea?
> thanks
> --
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Re: [gmx-users] script

2019-03-07 Thread Quyen Vu
a dirty way:
grep -v ref_t npt.mdp >new.mdp && echo -e "ref_t=300" >>new.mdp
sorry again!


On Thu, Mar 7, 2019 at 6:16 PM Amin Rouy  wrote:

> It is fine.
> My question was not about '.mdp' itself. I meant how to define the
> 'Temperature' inside the bash scrip, to avoid changing it by opening the
> .mdp file.
>
>
> On Thu, Mar 7, 2019 at 4:57 PM Quyen Vu  wrote:
>
> > Dear all,
> > It's my fault that I have un-nice behavior, I'm so sorry for that.
> > If I understand correctly, you are working with Gromacs so you should
> > understand what is the .mdp file used for and there, the document of
> > temperature section talk about that.
> >
> >
> > On Thu, Mar 7, 2019 at 4:06 PM Amin Rouy  wrote:
> >
> > > Thank you Justin.
> > >
> > > Yes, Quyen I've read the manual. I got helps from Justin's scrips in
> his
> > > tutorial page (great source) and googled before I came to write here.
> > >
> > >
> > > On Thu, Mar 7, 2019 at 4:01 PM Justin Lemkul  wrote:
> > >
> > > >
> > > >
> > > > On 3/7/19 9:56 AM, Quyen Vu wrote:
> > > > > my question for you: have you ever read gromacs
> manual/documentation?
> > > >
> > > > Where in the GROMACS manual do we discuss how to use Linux commands
> to
> > > > alter scripts in this way? Please do not simply dismiss others'
> > > > questions; it is not productive and not helpful. There are legitimate
> > > > cases of users not utilizing documentation and web searching, but I
> > > > would argue this is not one of them.
> > > >
> > > > > On Thu, Mar 7, 2019 at 1:14 PM Amin Rouy 
> > > wrote:
> > > > >
> > > > >> Hi
> > > > >>
> > > > >> I would like to change the temperature of the simulation (NPT.mdp)
> > > > inside
> > > > >> my bash script, any one has idea?
> > > >
> > > > You can make replacements in files using standard Linux utilities
> like
> > > > sed, in conjunction with others like grep and awk. This isn't a
> > > > GROMACS-specific issue, so I'd suggest looking at more general Linux
> > > > forums.
> > > >
> > > > -Justin
> > > >
> > > > --
> > > > ==
> > > >
> > > > Justin A. Lemkul, Ph.D.
> > > > Assistant Professor
> > > > Office: 301 Fralin Hall
> > > > Lab: 303 Engel Hall
> > > >
> > > > Virginia Tech Department of Biochemistry
> > > > 340 West Campus Dr.
> > > > Blacksburg, VA 24061
> > > >
> > > > jalem...@vt.edu | (540) 231-3129
> > > > http://www.thelemkullab.com
> > > >
> > > > ==
> > > >
> > > > --
> > > > Gromacs Users mailing list
> > > >
> > > > * Please search the archive at
> > > > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before
> > > > posting!
> > > >
> > > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
> > > >
> > > > * For (un)subscribe requests visit
> > > > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users
> or
> > > > send a mail to gmx-users-requ...@gromacs.org.
> > > >
> > > --
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Re: [gmx-users] script

2019-03-07 Thread Amin Rouy
It is fine.
My question was not about '.mdp' itself. I meant how to define the
'Temperature' inside the bash scrip, to avoid changing it by opening the
.mdp file.


On Thu, Mar 7, 2019 at 4:57 PM Quyen Vu  wrote:

> Dear all,
> It's my fault that I have un-nice behavior, I'm so sorry for that.
> If I understand correctly, you are working with Gromacs so you should
> understand what is the .mdp file used for and there, the document of
> temperature section talk about that.
>
>
> On Thu, Mar 7, 2019 at 4:06 PM Amin Rouy  wrote:
>
> > Thank you Justin.
> >
> > Yes, Quyen I've read the manual. I got helps from Justin's scrips in his
> > tutorial page (great source) and googled before I came to write here.
> >
> >
> > On Thu, Mar 7, 2019 at 4:01 PM Justin Lemkul  wrote:
> >
> > >
> > >
> > > On 3/7/19 9:56 AM, Quyen Vu wrote:
> > > > my question for you: have you ever read gromacs manual/documentation?
> > >
> > > Where in the GROMACS manual do we discuss how to use Linux commands to
> > > alter scripts in this way? Please do not simply dismiss others'
> > > questions; it is not productive and not helpful. There are legitimate
> > > cases of users not utilizing documentation and web searching, but I
> > > would argue this is not one of them.
> > >
> > > > On Thu, Mar 7, 2019 at 1:14 PM Amin Rouy 
> > wrote:
> > > >
> > > >> Hi
> > > >>
> > > >> I would like to change the temperature of the simulation (NPT.mdp)
> > > inside
> > > >> my bash script, any one has idea?
> > >
> > > You can make replacements in files using standard Linux utilities like
> > > sed, in conjunction with others like grep and awk. This isn't a
> > > GROMACS-specific issue, so I'd suggest looking at more general Linux
> > > forums.
> > >
> > > -Justin
> > >
> > > --
> > > ==
> > >
> > > Justin A. Lemkul, Ph.D.
> > > Assistant Professor
> > > Office: 301 Fralin Hall
> > > Lab: 303 Engel Hall
> > >
> > > Virginia Tech Department of Biochemistry
> > > 340 West Campus Dr.
> > > Blacksburg, VA 24061
> > >
> > > jalem...@vt.edu | (540) 231-3129
> > > http://www.thelemkullab.com
> > >
> > > ==
> > >
> > > --
> > > Gromacs Users mailing list
> > >
> > > * Please search the archive at
> > > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before
> > > posting!
> > >
> > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
> > >
> > > * For (un)subscribe requests visit
> > > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or
> > > send a mail to gmx-users-requ...@gromacs.org.
> > >
> > --
> > Gromacs Users mailing list
> >
> > * Please search the archive at
> > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before
> > posting!
> >
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> >
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> > send a mail to gmx-users-requ...@gromacs.org.
> >
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[gmx-users] VMD visualization is failed

2019-03-07 Thread mary ko
Dear all
I have simulated a protein-ligand system and the md.xtc and md.gro are now 
generated in the output. Unlike my previous simulations of nano systems in 
which the .trr trajectory was in the output and the visualization could be done 
in an straight forward way of opening the .gro and .trr consecutively, the .trr 
is not present now. I used gmx_mpi -f md.mdp -c npt.gro -t npt.cpt -p topol.top 
-n index.ndx -o md.tpr AND gmx_mpi mdrun -ntomp 2 -pin auto -s md.tpr -cpi 
md.cpt -tunepme -v -gpu_id 0 -nb gpu AND also gmx_mpi trjconv -f md.xtc -s 
md.tpr -o md_convert.gro -ur compact -pbc mol -center. How should I visualize 
the simulation in VMD having the .gro and .xtc?Is there a problem in the 
commands I used or a missing option in the .mdp that the .trr is not 
generated?Thanks.
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[gmx-users] User tabulated potential and VdW Modifier

2019-03-07 Thread Kiesel, Matthias
Dear everyone,

My question concerns the effect of the mdp option "vdw-modifier" when vdwtype 
is set to user. I have a tabulated 8 - 6 Mie potential and I'm simulating a 
coarse grained water, NaCl system, which all interact with the same potential 
form but different dispersion coefficients. I wanted to check the energy 
conservation of that system and therefore set up a simulation as follows:

dt = 0.008

cutoff-scheme = group
rlist = 2.3

vdwtype = user
vdw-modifier = potential-shift
rvdw = 2
rvdw-switch = 2

coulomtype = PME-switch
rcoulomb = 2
rcoulomb-switch = 1.95

I will limit my discussion to the VdW energies, since I trust the PME algorithm 
and I did not change any of the settings in the following discussion. As far as 
I can judge, this system should be energy conserving, because the potential is 
shifted, and there is enough space between rvdw and rlist to allow for 
diffusion in between updates of the neighbourlist. However, this system 
exhibits an energy drift (total energy) of over 1000 kJ/mol over the course of
30.000 integration steps. On a side note, I also calculated the LJ long range 
corrections, which is -1888 kJ/mol.
After this simulation I thought, that the vdw-modifier does not affect the 
tabulated potential. Therefore, I calculated a shifted version of my potential 
and fed it to gromacs with the same parameters except:

vdw-modifier = none

which effectively should enforce a cutoff equal to that in my tabulated 
potential (2nm). This setup conserves the energy (Drift ~ 0.4 kJ/mol) and gives 
me a slightly higher LJ energy, which I expected. However, the long range 
correction was different: -946 kJ/mol (appr. half). This seemed odd to me, so I 
played around with some settings and found that the LR correction took the 
value of -946 for  vdw-modifier = none and -1888 for vdw-modifier = 
potential-shift. This was also true for a setup with rlist = rvdw = rvdw-switch 
= 2 (and nstlist = 1), so it wasn't the difference between rlist and 
rvdw-switch.

According to the manual and grompp notes, the LR correction is calculated as 
-C6/r_c^6, which should be the same for all simulations, but apparently the 
vdw-modifier changes something somewhere. Does anyone have an explanation on 
what's the reason for the behaviour of the LR correction? And also, more 
generally, are vdw modifier supposed to work for user lists (and if so, why did 
my initial setup not work)?

Thank you very much in advance,

Matthias




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Re: [gmx-users] script

2019-03-07 Thread Quyen Vu
Dear all,
It's my fault that I have un-nice behavior, I'm so sorry for that.
If I understand correctly, you are working with Gromacs so you should
understand what is the .mdp file used for and there, the document of
temperature section talk about that.


On Thu, Mar 7, 2019 at 4:06 PM Amin Rouy  wrote:

> Thank you Justin.
>
> Yes, Quyen I've read the manual. I got helps from Justin's scrips in his
> tutorial page (great source) and googled before I came to write here.
>
>
> On Thu, Mar 7, 2019 at 4:01 PM Justin Lemkul  wrote:
>
> >
> >
> > On 3/7/19 9:56 AM, Quyen Vu wrote:
> > > my question for you: have you ever read gromacs manual/documentation?
> >
> > Where in the GROMACS manual do we discuss how to use Linux commands to
> > alter scripts in this way? Please do not simply dismiss others'
> > questions; it is not productive and not helpful. There are legitimate
> > cases of users not utilizing documentation and web searching, but I
> > would argue this is not one of them.
> >
> > > On Thu, Mar 7, 2019 at 1:14 PM Amin Rouy 
> wrote:
> > >
> > >> Hi
> > >>
> > >> I would like to change the temperature of the simulation (NPT.mdp)
> > inside
> > >> my bash script, any one has idea?
> >
> > You can make replacements in files using standard Linux utilities like
> > sed, in conjunction with others like grep and awk. This isn't a
> > GROMACS-specific issue, so I'd suggest looking at more general Linux
> > forums.
> >
> > -Justin
> >
> > --
> > ==
> >
> > Justin A. Lemkul, Ph.D.
> > Assistant Professor
> > Office: 301 Fralin Hall
> > Lab: 303 Engel Hall
> >
> > Virginia Tech Department of Biochemistry
> > 340 West Campus Dr.
> > Blacksburg, VA 24061
> >
> > jalem...@vt.edu | (540) 231-3129
> > http://www.thelemkullab.com
> >
> > ==
> >
> > --
> > Gromacs Users mailing list
> >
> > * Please search the archive at
> > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before
> > posting!
> >
> > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
> >
> > * For (un)subscribe requests visit
> > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or
> > send a mail to gmx-users-requ...@gromacs.org.
> >
> --
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>
> * Please search the archive at
> http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before
> posting!
>
> * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
>
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> send a mail to gmx-users-requ...@gromacs.org.
>
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Re: [gmx-users] script

2019-03-07 Thread Amin Rouy
Thank you Justin.

Yes, Quyen I've read the manual. I got helps from Justin's scrips in his
tutorial page (great source) and googled before I came to write here.


On Thu, Mar 7, 2019 at 4:01 PM Justin Lemkul  wrote:

>
>
> On 3/7/19 9:56 AM, Quyen Vu wrote:
> > my question for you: have you ever read gromacs manual/documentation?
>
> Where in the GROMACS manual do we discuss how to use Linux commands to
> alter scripts in this way? Please do not simply dismiss others'
> questions; it is not productive and not helpful. There are legitimate
> cases of users not utilizing documentation and web searching, but I
> would argue this is not one of them.
>
> > On Thu, Mar 7, 2019 at 1:14 PM Amin Rouy  wrote:
> >
> >> Hi
> >>
> >> I would like to change the temperature of the simulation (NPT.mdp)
> inside
> >> my bash script, any one has idea?
>
> You can make replacements in files using standard Linux utilities like
> sed, in conjunction with others like grep and awk. This isn't a
> GROMACS-specific issue, so I'd suggest looking at more general Linux
> forums.
>
> -Justin
>
> --
> ==
>
> Justin A. Lemkul, Ph.D.
> Assistant Professor
> Office: 301 Fralin Hall
> Lab: 303 Engel Hall
>
> Virginia Tech Department of Biochemistry
> 340 West Campus Dr.
> Blacksburg, VA 24061
>
> jalem...@vt.edu | (540) 231-3129
> http://www.thelemkullab.com
>
> ==
>
> --
> Gromacs Users mailing list
>
> * Please search the archive at
> http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before
> posting!
>
> * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
>
> * For (un)subscribe requests visit
> https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or
> send a mail to gmx-users-requ...@gromacs.org.
>
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Re: [gmx-users] script

2019-03-07 Thread Benson Muite
This is a welcoming and friendly community, with somewhat busy but still 
nice people. The manual is available at:


http://manual.gromacs.org/documentation/

One can search for temperature information here:

http://manual.gromacs.org/documentation/current/reference-manual/index.html

to find :

http://manual.gromacs.org/documentation/current/user-guide/mdp-options.html?highlight=temperature

On 3/7/19 4:56 PM, Quyen Vu wrote:

my question for you: have you ever read gromacs manual/documentation?

On Thu, Mar 7, 2019 at 1:14 PM Amin Rouy  wrote:


Hi

I would like to change the temperature of the simulation (NPT.mdp) inside
my bash script, any one has idea?
thanks
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Re: [gmx-users] script

2019-03-07 Thread Justin Lemkul




On 3/7/19 9:56 AM, Quyen Vu wrote:

my question for you: have you ever read gromacs manual/documentation?


Where in the GROMACS manual do we discuss how to use Linux commands to 
alter scripts in this way? Please do not simply dismiss others' 
questions; it is not productive and not helpful. There are legitimate 
cases of users not utilizing documentation and web searching, but I 
would argue this is not one of them.



On Thu, Mar 7, 2019 at 1:14 PM Amin Rouy  wrote:


Hi

I would like to change the temperature of the simulation (NPT.mdp) inside
my bash script, any one has idea?


You can make replacements in files using standard Linux utilities like 
sed, in conjunction with others like grep and awk. This isn't a 
GROMACS-specific issue, so I'd suggest looking at more general Linux forums.


-Justin

--
==

Justin A. Lemkul, Ph.D.
Assistant Professor
Office: 301 Fralin Hall
Lab: 303 Engel Hall

Virginia Tech Department of Biochemistry
340 West Campus Dr.
Blacksburg, VA 24061

jalem...@vt.edu | (540) 231-3129
http://www.thelemkullab.com

==

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Re: [gmx-users] script

2019-03-07 Thread Quyen Vu
my question for you: have you ever read gromacs manual/documentation?

On Thu, Mar 7, 2019 at 1:14 PM Amin Rouy  wrote:

> Hi
>
> I would like to change the temperature of the simulation (NPT.mdp) inside
> my bash script, any one has idea?
> thanks
> --
> Gromacs Users mailing list
>
> * Please search the archive at
> http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before
> posting!
>
> * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
>
> * For (un)subscribe requests visit
> https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or
> send a mail to gmx-users-requ...@gromacs.org.
>
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[gmx-users] question about the QM/MM calcuation in Gromacs/ORCA interface

2019-03-07 Thread Mahnaz Tehrani
Dear all,

I am going to use Gromacs/ORCA interface for QM/MM calculation in the
metalloenzyme model. I have done some QMMM calculations with other
interface (AMBER/TURBOMOLE)  I am also familiar with QM in ORCA but new
user of Gromacs!

I could get general overview how this feature works in Gromacs (from 2
provided tutorial examples and also Q/A of users in the mailing list) but
that would be great to have a successful sample model to reproduce data
before running the real model.

I was going to test "Thymine dimer splitting" as given example with MOPAC
interface (http://wwwuser.gwdg.de/~ggroenh/SaoCarlos2008/html/tutorial.html)
and using provided files from the website then use ORCA interface for QM
part but it was not successful. so can you please someone share the example
with me (inputs/output). Any help would be really appreciated!

Regards,

Zahra


-- 

Zahra Aliakbar Tehrani

Ph.D. in Physical Organic Chemistry
Post-Doctoral Researcher, Institute of Organic Chemistry & Biochemistry
AS CR, v.v.i. (IOCB), 166 10 Praha 6

E-mail: zahra.aliakbar_tehr...@uochb.cas.cz
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[gmx-users] script

2019-03-07 Thread Amin Rouy
Hi

I would like to change the temperature of the simulation (NPT.mdp) inside
my bash script, any one has idea?
thanks
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[gmx-users] v-rescale reproducible restart

2019-03-07 Thread Sergio Perez
Dear gmx comunity,

I have done the following:
-Ran a 100ps simulation and then starting  with the same conditions a 30ps
simulation and then restarted upto 100ps.
-If I use -reprod and Nosé hoover thermostat in both trajectories the final
structures match.
-If I use v-rescale it doesn't.

I know since v-rescale is stocastic, random numbers should be properly
saved in the cpt for the chain of random numbers to be reproducible when
doing a restart. I am not sure if this is not happening because it is
impossible to do or if it is a bug. If it is not a bug, a note or something
in this regard in the output would be nice. I am using gromacs.2018.4 with
mpi.

In addition, I think the name of the thermostat "v-rescale" is not very
good (although I am not sure if it's too late to be changed). It gives the
impression that velocities are just being rescaled (which would be
completely wrong). Furthermore, if we credit with the author name  the
Parrinello-Rahman, Nose-Hoover, Berendsen methods. Why not
Bussi-Donaio-Parrinello?

Thank you very much!

Sergio Pérez-Conesa
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