[lammps-users] Creating data file


I'm interesting in creating data.file for lammps command read_data,
but writing it by hands is to hard. Is there some software for
creating it in GUI (the most problem is defining coordinates of atoms)

If you have a PDB file (which various GUI creators can write out)
then there is a LAMMPS tool which converts PDB to data files.
See the docs on the tools directory.