NAME

       trjcat - concatenates trajectory files

       VERSION 4.6.5

SYNOPSIS

       trjcat  -f  traj.xtc  -o  trajout.xtc -n index.ndx -demux remd.xvg -[no]h -[no]version -nice int -tu enum
       -xvg enum -b time -e time -dt time -prec int -[no]vel -[no]settime -[no]sort -[no]keeplast -[no]overwrite
       -[no]cat

DESCRIPTION

        trjcat concatenates several input trajectory files in sorted order.  In case of double time  frames  the
       one  in  the  later  file  is used.  By specifying  -settime you will be asked for the start time of each
       file. The input files are taken from the command line, such that a  command  like   trjcat  -f  *.trr  -o
       fixed.trr  should  do the trick. Using  -cat, you can simply paste several files together without removal
       of frames with identical time stamps.

       One important option is inferred when the output file is amongst the  input  files.  In  that  case  that
       particular  file  will  be  appended to which implies you do not need to store double the amount of data.
       Obviously the file to append to has to be the one with lowest starting time since one can only append  at
       the end of a file.

       If  the   -demux  option  is  given,  the  N  trajectories that are read, are written in another order as
       specified in the  .xvg file.  The  .xvg file should contain something like:

        0  0  1  2  3  4  5

       2  1  0  2  3  5  4

       Where the first number is the time, and subsequent numbers  point  to  trajectory  indices.   The  frames
       corresponding  to  the numbers present at the first line are collected into the output trajectory. If the
       number of frames in the trajectory does not match that in the  .xvg file then the  program  tries  to  be
       smart. Beware.

FILES

       -f traj.xtc Input, Mult.
        Trajectory: xtc trr trj gro g96 pdb cpt

       -o trajout.xtc Output, Mult.
        Trajectory: xtc trr trj gro g96 pdb

       -n index.ndx Input, Opt.
        Index file

       -demux remd.xvg Input, Opt.
        xvgr/xmgr file

OTHER OPTIONS

       -[no]hno
        Print help info and quit

       -[no]versionno
        Print version info and quit

       -nice int 19
        Set the nicelevel

       -tu enum ps
        Time unit:  fs,  ps,  ns,  us,  ms or  s

       -xvg enum xmgrace
        xvg plot formatting:  xmgrace,  xmgr or  none

       -b time -1
        First time to use (ps)

       -e time -1
        Last time to use (ps)

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

       -prec int 3
        Precision for  .xtc and  .gro writing in number of decimal places

       -[no]velyes
        Read and write velocities if possible

       -[no]settimeno
        Change starting time interactively

       -[no]sortyes
        Sort trajectory files (not frames)

       -[no]keeplastno
        Keep overlapping frames at end of trajectory

       -[no]overwriteno
        Overwrite overlapping frames during appending

       -[no]catno
        Do not discard double time frames

SEE ALSO

       gromacs(7)

       More information about GROMACS is available at <http://www.gromacs.org/>.

                                                 Mon 2 Dec 2013                                        trjcat(1)