Elaine,

Sorry for repeating the post. The previous post says that i can get the centroid by typing the following commands.
I opened a pdb file (attached) in Chimera. I typed sel, reset, focus sel. Then i got the centroid as 28,31,31. I closed the session and opened the molecule again and gave Actions --> Atombs/Bonds --> show to display all the atoms. Then i typed the same commands sel --> reset ---> focus sel. the calculated centroid was 31.3,30.9,30.8. Why am i getting a slightly different centroid in this case ?
Bala

On Fri, Dec 18, 2009 at 6:38 PM, Elaine Meng <meng@cgl.ucsf.edu> wrote:
Hi Bala,
You asked the same question earlier this year!  Here is the answer:

<http://www.cgl.ucsf.edu/pipermail/chimera-users/2009-March/003648.html>

Elaine
-----
Elaine C. Meng, Ph.D.                          meng@cgl.ucsf.edu
UCSF Computer Graphics Lab and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco
                    http://www.cgl.ucsf.edu/home/meng/index.html



On Dec 18, 2009, at 8:40 AM, Bala subramanian wrote:

Friends,
Is is possible to find the central x,y,z coordinates of a pdb file in chimera.
Bala