Hi Christoph,

I checked my input file for atomistic simulation and I found that I have 
wrote 'fx fy fy' for dump command and now all calculations run well. Thank 
you very much for your suggestion. 

I have another question about a big PA6 system with around 500 000 atoms. 
There is only one type molecule which composes of 350 monomers. When I want 
use lammps dump file to write out the coarse grained dump file, I need to 
manually to redefine every atoms in one molecule in the topol.xml file. It 
seems to be a big project.I am wondering, if there is a simpler method to 
get topol.xml file. Or can you give me some suggestion about how to get 
coarse grained trajectory from lammps dump file?


在 2019年6月25日星期二 UTC+2下午5:14:32,Christoph Junghans写道:
>
> On Tue, Jun 25, 2019 at 7:00 AM 徐祥 <[email protected] <javascript:>> 
> wrote: 
> > 
> > Dear Votca user, 
> > 
> > I want to use csg_map to print out the coarse grained .dump file and 
> then using force matching with fix mscg in LAMMPS. But something strange 
> happened in the output file with fz part. 
> > At the same time, I'm not sure whether the force in x and y direction 
> are correct or not. 
> > 
> > I'd really appriciate when anyone can give me advices on how to write 
> the force out to coarse grained dump file. 
> Are the cg positions in the right spots? Have you tried to calculate 
> the force by hand for one molecule to check the output? 
>
> Christoph 
>
> > Sincerely 
> > Xiang 
> > 
> > Command that I used: csg_map --top topol.xml --trj equil.dump --cg 
> pa6.xml --force --out cg-pa6.dump 
> > 
> > cg-pa6.dump: 
> > ITEM: TIMESTEP 
> > 0 
> > ITEM: NUMBER OF ATOMS 
> > 14 
> > ITEM: BOX BOUNDS pp pp pp 
> > 0 7.580733 
> > 0 7.580733 
> > 0 7.580733 
> > ITEM: ATOMS id type x y z vx vy vz fx fy fz 
> > 1 0 1.494355 5.404279 2.907944 0.000000 0.000000 0.000000 12.592400 
> -8.377850 
> 2364558032109094518889807635948683089570290241435415640820108792995599899436389788035156285502740606890601998922988529557877069609479960232025272358933154586821185153955592591638528.000000
>  
>
> > 2 1 2.243347 4.295022 4.439319 0.000000 0.000000 0.000000 13.479409 
> 20.502260 0.000000 
> > 3 1 2.189802 5.142636 5.923261 0.000000 0.000000 0.000000 3.866210 
> -23.597252 0.000000 
> > 4 1 3.512938 6.026377 6.282445 0.000000 0.000000 0.000000 -9.861500 
> 19.987040 0.000000 
> > 5 1 3.926211 7.069904 5.005361 0.000000 0.000000 0.000000 9.756520 
> -4.570800 0.000000 
> > 6 1 3.486172 0.987056 5.492920 0.000000 0.000000 0.000000 -3.419280 
> -4.679090 0.000000 
> > 7 2 4.307480 1.466052 6.723431 0.000000 0.000000 0.000000 -2.598060 
> -8.584390 0.000000 
> > 8 0 5.289278 4.682029 2.350134 0.000000 0.000000 0.000000 -14.249870 
> 19.920390 0.000000 
> > 9 1 5.789601 4.273695 4.227886 0.000000 0.000000 0.000000 17.436400 
> -18.399210 0.000000 
> > 10 1 6.045801 2.682748 4.436048 0.000000 0.000000 0.000000 -26.629610 
> 23.138802 0.000000 
> > 11 1 7.252864 2.148874 3.534152 0.000000 0.000000 0.000000 18.012220 
> -4.469040 0.000000 
> > 12 1 0.184249 0.859154 4.367202 0.000000 0.000000 0.000000 24.419730 
> -7.101160 0.000000 
> > 13 1 0.196048 0.857591 6.080679 0.000000 0.000000 0.000000 -14.616470 
> 15.636000 0.000000 
> > 14 2 0.946176 2.051363 6.933684 0.000000 0.000000 0.000000 -28.187900 
> -19.405670 0.000000 
> > 
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>
> -- 
> Christoph Junghans 
> Web: http://www.compphys.de 
>

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