1 .TH trjcat 1 "Thu 26 Aug 2010" "" "GROMACS suite, VERSION 4.5"
3 trjcat - concatenates trajectory files
9 .BI "\-o" " trajout.xtc "
10 .BI "\-n" " index.ndx "
11 .BI "\-demux" " remd.xvg "
13 .BI "\-[no]version" ""
22 .BI "\-[no]settime" ""
24 .BI "\-[no]keeplast" ""
25 .BI "\-[no]overwrite" ""
28 \&trjcat concatenates several input trajectory files in sorted order.
29 \&In case of double time frames the one in the later file is used.
30 \&By specifying \fB \-settime\fR you will be asked for the start time
31 \&of each file. The input files are taken from the command line,
32 \&such that a command like \fB trjcat \-o fixed.trr *.trr\fR should do
33 \&the trick. Using \fB \-cat\fR you can simply paste several files
34 \&together without removal of frames with identical time stamps.
37 \&One important option is inferred when the output file is amongst the
38 \&input files. In that case that particular file will be appended to
39 \&which implies you do not need to store double the amount of data.
40 \&Obviously the file to append to has to be the one with lowest starting
41 \&time since one can only append at the end of a file.
44 \&If the \fB \-demux\fR option is given, the N trajectories that are
45 \&read, are written in another order as specified in the xvg file.
46 \&The xvg file should contain something like:
53 \&Where the first number is the time, and subsequent numbers point to
55 \&The frames corresponding to the numbers present at the first line
56 \&are collected into the output trajectory. If the number of frames in
57 \&the trajectory does not match that in the xvg file then the program
58 \&tries to be smart. Beware.
62 Trajectory: xtc trr trj gro g96 pdb cpt
64 .BI "\-o" " trajout.xtc"
66 Trajectory: xtc trr trj gro g96 pdb
68 .BI "\-n" " index.ndx"
72 .BI "\-demux" " remd.xvg"
78 Print help info and quit
80 .BI "\-[no]version" "no "
81 Print version info and quit
83 .BI "\-nice" " int" " 19"
86 .BI "\-tu" " enum" " ps"
87 Time unit: \fB fs\fR, \fB ps\fR, \fB ns\fR, \fB us\fR, \fB ms\fR or \fB s\fR
89 .BI "\-xvg" " enum" " xmgrace"
90 xvg plot formatting: \fB xmgrace\fR, \fB xmgr\fR or \fB none\fR
92 .BI "\-b" " time" " \-1 "
93 First time to use (ps)
95 .BI "\-e" " time" " \-1 "
98 .BI "\-dt" " time" " 0 "
99 Only write frame when t MOD dt = first time (ps)
101 .BI "\-prec" " int" " 3"
102 Precision for .xtc and .gro writing in number of decimal places
104 .BI "\-[no]vel" "yes "
105 Read and write velocities if possible
107 .BI "\-[no]settime" "no "
108 Change starting time interactively
110 .BI "\-[no]sort" "yes "
111 Sort trajectory files (not frames)
113 .BI "\-[no]keeplast" "no "
114 keep overlapping frames at end of trajectory
116 .BI "\-[no]overwrite" "no "
117 overwrite overlapping frames during appending
119 .BI "\-[no]cat" "no "
120 do not discard double time frames
125 More information about \fBGROMACS\fR is available at <\fIhttp://www.gromacs.org/\fR>.