Anitha wrote:
my header starts as

# g_sas is part of G R O M A C S:
#
# GROtesk MACabre and Sinister
#
@    title "Area per residue"
@    xaxis  label "Residue"
@    yaxis  label "Area (nm\S2\N)"
@TYPE xy
         1    0.846565   0.312334
         2       0.598   0.189911
         3    0.837035   0.363443
         4     1.14936   0.304359
         5    0.630063   0.233607
         6    0.625571   0.321569
         7    0.261401   0.240533
         8   0.0940011  0.0872611


i`m not able to understand what the second and third column represents....

This is a plot of surface area per residue, and as the y-axis label indicates, you have area in square nm. The second column is the area, the third column is the fluctuation. The last column is not immediately obvious, but from the code it is clear (and an identical question posted to this list not too long ago).

-Justin



On Fri, Jul 30, 2010 at 4:33 PM, Justin A. Lemkul <jalem...@vt.edu <mailto:jalem...@vt.edu>> wrote:



    Anitha wrote:

        In the headers file also i didn`t get the answer about those
        lines....


    Well, what do they say?

    -Justin

        On Fri, Jul 30, 2010 at 4:01 PM, Justin A. Lemkul
        <jalem...@vt.edu <mailto:jalem...@vt.edu>
        <mailto:jalem...@vt.edu <mailto:jalem...@vt.edu>>> wrote:



           Anitha wrote:

               I executed the following command.

               g_sas -s topol.tpr -f traj.xtc -or resarea.xvg -o area.xvg
               xmgrace -nxy resarea.xvg


               I have chosen the protein group for surface calculation
        and output.
               I get two sets of values: one is bigger (black) than the
        other
               (red).

               I have checked the manual and other sources, but I could
        not find an
               answer about the black and red line.  What does red and black
               line shows?


           Read the headers of the .xvg file.

           -Justin


               --         S.Anitha


           --     ========================================

           Justin A. Lemkul
           Ph.D. Candidate
           ICTAS Doctoral Scholar
           MILES-IGERT Trainee
           Department of Biochemistry
           Virginia Tech
           Blacksburg, VA
           jalemkul[at]vt.edu <http://vt.edu> <http://vt.edu> | (540)
        231-9080

           http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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-- S.Anitha


-- ========================================

    Justin A. Lemkul
    Ph.D. Candidate
    ICTAS Doctoral Scholar
    MILES-IGERT Trainee
    Department of Biochemistry
    Virginia Tech
    Blacksburg, VA
    jalemkul[at]vt.edu <http://vt.edu> | (540) 231-9080
    http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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--
S.Anitha


--
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
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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