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g_order_d

NAME

g_order - computes the order parameter per atom for carbon tails

SYNOPSIS

g_order -f traj.xtc -n index.ndx -s topol.tpr -o order.xvg -od deuter.xvg -os sliced.xvg -[no]h -nice int -b time -e time -dt time -[no]w -[no]xvgr -d enum -sl int -[no]szonly -[no]unsat

DESCRIPTION

Compute the order parameter per atom for carbon tails. For atom i the vector i-1, i+1 is used together with an axis. The index file has to contain a group with all equivalent atoms in all tails for each atom the order parameter has to be calculated for. The program can also give all diagonal elements of the order tensor and even calculate the deuterium order parameter Scd (default). If the option -szonly is given, only one order tensor component (specified by the -d option) is given and the order parameter per slice is calculated as well. If -szonly is not selected, all diagonal elements and the deuterium order parameter is given.

FILES

-f traj.xtc Input
 Generic trajectory: xtc trr trj gro g96 pdb 

-n index.ndx Input
 Index file 

-s topol.tpr Input
 Generic run input: tpr tpb tpa xml 

-o order.xvg Output
 xvgr/xmgr file 

-od deuter.xvg Output
 xvgr/xmgr file 

-os sliced.xvg Output
 xvgr/xmgr file 

OTHER OPTIONS

-[no]h no
 Print help info and quit

-nice int 19
 Set the nicelevel

-b time 0
 First frame (ps) to read from trajectory

-e time 0
 Last frame (ps) to read from trajectory

-dt time 0
 Only use frame when t MOD dt = first time (ps)

-[no]w no
 View output xvg, xpm, eps and pdb files

-[no]xvgr yes
 Add specific codes (legends etc.) in the output xvg files for the xmgrace program

-d enum z
 Direction of the normal on the membrane:  z , x or y

-sl int 1
 Calculate order parameter as function of boxlength, dividing the box in nr slices.

-[no]szonly no
 Only give Sz element of order tensor. (axis can be specified with -d)

-[no]unsat no
 Calculate order parameters for unsaturated carbons. Note that this cannot be mixed with normal order parameters.

SEE ALSO

gromacs(7)

More information about the GROMACS suite is available in /usr/share/doc/gromacs or at <http://www.gromacs.org/>.