I have a question about the out file of this command
fix msd water ave/time 1 1 1 c_msd c_msd c_msd file msddumpfile
and out put is
TimeStep c_msd c_msd c_msd
0 1.26243e-29 3.25611e-32 3.72346e-32
1 7.03667e-14 9.08628e-14 7.05988e-14
now i want to know what is different between these msds 1 - 2 -3 ? for example I want to know the msd of water in polymer and water is as group in input file . which of these msd should i use?
thanks a lot