The documentation(http://www.cs.sandia.gov/~sjplimp/lammps/doc/fix_shake.html) on fix shake of LAMMPS has the following example:
"fix 1 sub shake 0.0001 20 10 b 4 19 4 a 3 5 2"
Why is the bondtype 4 mentioned twice after the keyword b? Is this some syntax? The second example also has "t 4 6 4" with atomtype 4 repeated twice.
Vishal
that's just a typo, I'll change it in the doc files
Steve