g.html">xvg</a> plot formatting: <tt>xmgrace</tt>, <tt>xmgr</tt> or <tt>none</tt> </TD></TD>
<TR><TD ALIGN=RIGHT> <b><tt>-na</tt></b> </TD><TD ALIGN=RIGHT> int </TD><TD ALIGN=RIGHT> <tt>3</tt> </TD><TD> Number of atoms in a molecule </TD></TD>
<TR><TD ALIGN=RIGHT> <b><tt>-da</tt></b> </TD><TD ALIGN=RIGHT> int </TD><TD ALIGN=RIGHT> <tt>1</tt> </TD><TD> Atom used for the distance calculation, 0 is COM </TD></TD>
<TR><TD ALIGN=RIGHT> <b><tt>-[no]com</tt></b> </TD><TD ALIGN=RIGHT> gmx_bool </TD><TD ALIGN=RIGHT>