On 1/18/13 7:09 PM, Mortuza Munna wrote:
Dear gromacs user,
I have found that g_bundle can measure the angle between a group from
index file and z-axis with the option -z. Is it possible to measure the angle
of that group from index file with y-axis/x-axis? Any suggestion will be
appreciable.
You cannot do this directly with g_bundle without modifying the source code to
implement such functionality.
One approach would be to:
1. Use trjconv -sep to split your trajectory into individual frames (.pdb or
.gro)
2. Rotate each frame to realign what was previously x or y with the z-axis.
3. Concatenate the frames with trjcat into a new trajectory
4. Apply g_bundle -z
The above approach can easily be scripted.
-Justin
--
========================================
Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
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