Compute msd of one type of element

Hi Alex,

Sry I did not explain myself clearly. I have grouped the Oxygens and got what I want.
My question is : if I want to eliminate the statistical error of fluctuations, is this average option going to help?

Thanks,
Zizhen

Zizhen Zhou <[email protected]…24…> 于2020年7月17日周五 上午9:05写道:

Screen Shot 2020-07-17 at 8.37.16 am.png

no. to have less of a statistical error, you need to have a larger system or run longer trajectories or both.

Screen Shot 2020-07-17 at 8.37.16 am.png