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g_bondMain Table of Contents |
VERSION 4.6.1
Tue 5 Mar 2013
| VERSION 4.6.1 |
g_bond makes a distribution of bond lengths. If all is well a Gaussian distribution should be made when using a harmonic potential. Bonds are read from a single group in the index file in order i1-j1 i2-j2 through in-jn.
-tol gives the half-width of the distribution as a fraction of the bondlength (-blen). That means, for a bond of 0.2 a tol of 0.1 gives a distribution from 0.18 to 0.22.
Option -d plots all the distances as a function of time. This requires a structure file for the atom and residue names in the output. If however the option -averdist is given (as well or separately) the average bond length is plotted instead.
| option | filename | type | description |
|---|---|---|---|
| -f | traj.xtc | Input | Trajectory: xtc trr trj gro g96 pdb cpt |
| -n | index.ndx | Input | Index file |
| -s | topol.tpr | Input, Opt. | Structure+mass(db): tpr tpb tpa gro g96 pdb |
| -o | bonds.xvg | Output | xvgr/xmgr file |
| -l | bonds.log | Output, Opt. | Log file |
| -d | distance.xvg | Output, Opt. | xvgr/xmgr file |
| option | type | default | description |
|---|---|---|---|
| -[no]h | bool | no | Print help info and quit |
| -[no]version | bool | no | Print version 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 | bool | no | View output .xvg, .xpm, .eps and .pdb files |
| -xvg | enum | xmgrace | xvg plot formatting: xmgrace, xmgr or none |
| -blen | real | -1 | Bond length. By default length of first bond |
| -tol | real | 0.1 | Half width of distribution as fraction of -blen |
| -[no]aver | bool | yes | Average bond length distributions |
| -[no]averdist | bool | yes | Average distances (turns on -d) |