On 11/5/12 7:43 AM, akn wrote:
  Dear gmx users,

I want to compute the angle between two groups. I used g_sgangle -s
topol.tpr -f conf.gro -n index.ndx -oa sg_angle.xvg.
As I understand the first column refer to time and the second refer to
angle. What does the thrid column refer to in xvg file?

@    xaxis  label "Time (ps)"
@    yaxis  label "Angle (degrees)"
@TYPE xy
            0             1     0.0197823
         0.05            1             0
          0.1             1             0
         0.15            1     0.0197823
          0.2             1             0

Can you give an answer, please?


It is the cosine of the angle.

-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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