gmx morph [-f1 [<.gro/.g96/...>]] [-f2 [<.gro/.g96/...>]] [-n [<.ndx>]] [-o [<.xtc/.trr/...>]] [-or [<.xvg>]] [-[no]w] [-xvg <enum>] [-ninterm <int>] [-first <real>] [-last <real>] [-[no]fit]
gmx morph does a linear interpolation of conformations in order to create intermediates. Of course these are completely unphysical, but that you may try to justify yourself. Output is in the form of a generic trajectory. The number of intermediates can be controlled with the -ninterm flag. The first and last flag correspond to the way of interpolating: 0 corresponds to input structure 1 while 1 corresponds to input structure 2. If you specify -first < 0 or -last > 1 extrapolation will be on the path from input structure x_1 to x_2. In general, the coordinates of the intermediate x(i) out of N total intermediates correspond to:
x(i) = x_1 + (first+(i/(N-1))*(last-first))*(x_2-x_1)
Finally the RMSD with respect to both input structures can be computed if explicitly selected (-or option). In that case, an index file may be read to select the group from which the RMS is computed.
Options to specify input files:
Options to specify output files:
Other options: