1 .TH g_morph 1 "Thu 16 Oct 2008"
3 g_morph - linear interpolation of conformations
8 .BI "-f1" " conf1.gro "
9 .BI "-f2" " conf2.gro "
10 .BI "-o" " interm.xtc "
11 .BI "-or" " rms-interm.xvg "
12 .BI "-n" " index.ndx "
17 .BI "-ninterm" " int "
22 g_morph does a linear interpolation of conformations in order to
23 create intermediates. Of course these are completely unphysical, but
24 that you may try to justify yourself. Output is in the form of a
25 generic trajectory. The number of intermediates can be controlled with
26 the -ninterm flag. The first and last flag correspond to the way of
27 interpolating: 0 corresponds to input structure 1 while
28 1 corresponds to input strucutre 2.
29 If you specify first 0 or last 1 extrapolation will be
30 on the path from input structure x1 to x2. In general the coordinates
31 of the intermediate x(i) out of N total intermidates correspond to:
34 x(i) = x1 + (first+(i/(N-1))*(last-first))*(x2-x1)
37 Finally the RMSD with respect to both input structures can be computed
38 if explicitly selected (-or option). In that case an index file may be
39 read to select what group RMS is computed from.
41 .BI "-f1" " conf1.gro"
43 Structure file: gro g96 pdb tpr tpb tpa
45 .BI "-f2" " conf2.gro"
47 Structure file: gro g96 pdb tpr tpb tpa
49 .BI "-o" " interm.xtc"
51 Trajectory: xtc trr trj gro g96 pdb
53 .BI "-or" " rms-interm.xvg"
63 Print help info and quit
65 .BI "-nice" " int" " 0"
69 View output xvg, xpm, eps and pdb files
71 .BI "-[no]xvgr" "yes "
72 Add specific codes (legends etc.) in the output xvg files for the xmgrace program
74 .BI "-ninterm" " int" " 11"
75 Number of intermediates
77 .BI "-first" " real" " 0 "
78 Corresponds to first generated structure (0 is input x0, see above)
80 .BI "-last" " real" " 1 "
81 Corresponds to last generated structure (1 is input x1, see above)
84 Do a least squares fit of the second to the first structure before interpolating