[gmx-users] output force

Петр Попов magistrpetrus at gmail.com
Sun Oct 10 19:12:50 CEST 2010


Unfortunately I've got an error.

This is .mdp file:

title = title
cpp                 =  /lib/cpp
integrator          =  md
tinit               =  0.0
dt                  =  0.002
nsteps              =  25000
nstcomm             =  1
comm_grps           =  System
ld_seed             =  -1
niter               =  40
nstxout             =  10000
nstvout             =  0
nstfout             =  0
nstlog              =  500
nstenergy           =  100
nstlist             =  10
ns_type             =  grid
rlist               =  1.2
coulombtype         =  PME
rcoulomb            =  1.2
fourierspacing      =  0.12
pme_order           =  4
optimize_fft        =  yes
pbc                 =  xyz
vdwtype             =  Cut-off
rvdw                =  1.2
tcoupl              =  V-rescale
tc_grps             =  System
tau_t               =  0.1
ref_t               =  300.0
annealing           = single
annealing_npoints   = 3
annealing_time      = 0 5 50
annealing_temp      = 5 300 300
pcoupl              =  berendsen
pcoupltype          =  isotropic
compressibility     =  4.5e-5
tau_p               =  10.0
ref_p               =  1.0
gen_vel             =  yes
gen_temp            =  5.0
gen_seed            =  -1
constraints         =  all-bonds
constraint_algorithm      =  Lincs
lincs_order         =  4
disre               =  simple
disre_weighting     = conservative
disre_mixed         = no
nstdisreout         = 50000
disre_tau           = 0
pull                = constraint
pull_geometry       = distance
pull_dim            = Y Y Y
pull_constr_tol     = 1e-6
pull_nstfout        = 1
pull_nstxout        = 1
pull_ngroups        = 1
pull_group0         = a
pull_group1         = b
pull_init1          = 0.700
pull_start          = no
pull_k1             = 1000
lincs_iter          = 2
energygrps          = Protein Protein

I just replace in .mdp file line energygrps = System and the error is:

Fatal error:
Atom 1 in multiple Energy Mon. groups (1 and 2)

What should I do to avoid this?



10 октября 2010 г. 20:01 пользователь Петр Попов
<magistrpetrus at gmail.com>написал:

> Thank you very much!
>
> 10 октября 2010 г. 19:58 пользователь Justin A. Lemkul <jalemkul at vt.edu>написал:
>
>
>>
>> Петр Попов wrote:
>>
>>> So if I want to get protein-solvent component I should add in .mdp:
>>>
>>> energygrps = Protein SOL
>>>
>>> ?
>>>
>>>
>> Yes, and set nstlist = 1.
>>
>> -Justin
>>
>>  10 октября 2010 г. 16:41 пользователь Justin A. Lemkul <jalemkul at vt.edu<mailto:
>>> jalemkul at vt.edu>> написал:
>>>
>>>
>>>
>>>
>>>    Петр Попов wrote:
>>>
>>>        Thank you for response!
>>>        One more question:
>>>        How can I get file with energy groups? Should I use grompp with
>>>        a -e ener.edr option? In this case, how to build ener.edr file?
>>>
>>>
>>>    The "energrygrps" keyword is an .mdp option, so generate a new .tpr
>>>    file with the desired groups and use the -rerun feature of mdrun on
>>>    the trajectory that has already been produced.
>>>
>>>    -Justin
>>>
>>>        9 октября 2010 г. 14:50 пользователь Mark Abraham
>>>        <mark.abraham at anu.edu.au <mailto:mark.abraham at anu.edu.au>
>>>        <mailto:mark.abraham at anu.edu.au
>>>        <mailto:mark.abraham at anu.edu.au>>> написал:
>>>
>>>
>>>           You can get that with cunning use of energy groups and mdrun
>>>        -rerun,
>>>           but not mid-simulation.
>>>           Mark
>>>
>>>           ----- Original Message -----
>>>           From: Петр Попов <magistrpetrus at gmail.com
>>>        <mailto:magistrpetrus at gmail.com>
>>>           <mailto:magistrpetrus at gmail.com
>>>        <mailto:magistrpetrus at gmail.com>>>
>>>           Date: Saturday, October 9, 2010 21:41
>>>           Subject: [gmx-users] output force
>>>           To: gmx-users at gromacs.org <mailto:gmx-users at gromacs.org>
>>>        <mailto:gmx-users at gromacs.org <mailto:gmx-users at gromacs.org>>
>>>
>>>            > Hello dear gmx-users!
>>>            >
>>>            > When calculated forces in gromacs to produce pmf, we have
>>>        the net
>>>           force in output. For example:
>>>            > ...
>>>            > #
>>>            > # Giving Russians Opium May Alter Current Situation
>>>            > #
>>>            > @    title "Pull force"
>>>            > @    xaxis  label "Time (ps)"
>>>            > @    yaxis  label "Force (kJ/mol/nm)"
>>>            > @TYPE xy
>>>            > 0.000000                1017490.761270
>>>            > 0.002000                -253098.034916
>>>            > 0.004000                -43856.400160
>>>            > 0.006000                48980.619113
>>>            > 0.008000                52103.053067
>>>            > 0.010000                33788.090031
>>>            > 0.012000                19096.388350
>>>            > 0.014000                14094.738810
>>>            > 0.016000                14027.621966
>>>            > 0.018000                15162.993741
>>>            > 0.020000                14136.978177
>>>            > ... etc.
>>>            >
>>>            > What sould I do to get the net force of protein-solvent
>>>           interactions or protein-protein interactions or solvent-solvent
>>>           interactions instead and get output .xvg file in the form
>>>        like this:
>>>            >
>>>            > time     Force(type1)    Force(type2)    Force(type3)
>>>            >
>>>            > t1         f1                   f1                    f1
>>>            > t2         f2                   f2                    f2
>>>            > t3         f3                   f3                    f3
>>>            > ...        ...                   ...                    ...
>>>            > etc.
>>>            >
>>>            > Thank you for attention and I hope you will help me!
>>>            > --
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>>>
>>>    --     ========================================
>>>
>>>    Justin A. Lemkul
>>>    Ph.D. Candidate
>>>    ICTAS Doctoral Scholar
>>>    MILES-IGERT Trainee
>>>    Department of Biochemistry
>>>    Virginia Tech
>>>    Blacksburg, VA
>>>    jalemkul[at]vt.edu <http://vt.edu> | (540) 231-9080
>>>
>>>    http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>>>
>>>    ========================================
>>>
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>>>
>> --
>> ========================================
>>
>> Justin A. Lemkul
>> Ph.D. Candidate
>> ICTAS Doctoral Scholar
>> MILES-IGERT Trainee
>> Department of Biochemistry
>> Virginia Tech
>> Blacksburg, VA
>> jalemkul[at]vt.edu | (540) 231-9080
>> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>>
>> ========================================
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