no output from fix ave/chunk command

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1

Dear lammps users,

I want to use rerun command to read snapshots from a dump file to calculate number density in different bins. The dump file has id, type, q, x, y, z, vx, vy, vz, fx, fy, fz of each atom, with timestep ranging from 50,000 to 100,000 and a span of 100 steps. When the rerun command finishes, everything seems fine from my log file, but the output file writen by fix ave/chunk command doesn’t have any other information except the three default head lines. Could you tell me what the reason is and how to solve this problem? The related commands are as follow:

compute define_bin all chunk/atom bin/1d z lower 2.05 units box

fix 1 all ave/chunk 100 500 50000 define_bin density/number norm sample file density_number_of_different_bins.txt

rerun coord.txt first 50100 every 100 dump x y z box yes replace yes

Thanks and look forward to your reply.

Rui

2

Dear lammps users,

​please always report which version of LAMMPS you are using.

I want to use *rerun* command to read snapshots from a dump file to
calculate number density in different bins. The dump file has id, type, q,
x, y, z, vx, vy, vz, fx, fy, fz of each atom, with timestep ranging from
50,000 to 100,000 and a span of 100 steps. When the rerun command finishes,
everything seems fine from my log file, but the output file writen by *fix
ave/chunk* command doesn't have any other information except the three
default head lines. Could you tell me what the reason is and how to solve
this problem? The related commands are as follow:

compute define_bin all chunk/atom bin/1d z
  lower 2.05 units box

​​
fix 1 all ave/chunk 100
       500 50000 define_bin density/number norm
  sample file density_number_of_different_bins.txt

rerun coord.txt first 50100 every
    100 dump x y z box yes
replace yes

​you may have too few frames of coordinate data in your dump file.​

thus try with, e.g.:

​
fix 1 all ave/chunk 100
       400 40000 define_bin density/number norm
  sample file density_number_of_different_bins.txt

axel.