[gmx-users] the a.u. unit in the RMS distribution graph

[Lalehan Ozalp]

Hello everyone, I ran a cluster analysis for a 10 ns simulation and
produced rmsd-clust.xpm and rmsd-dist.xvg graphs. When I open the xvg file,
I see "a. u." in the y axis which I couldn't entirely understand. Is it
supposed to stand for atomic unit for length or mass or something else? I
provide the file as an example.

Thank you in advance.

Lalehan