From: Joseph Bylund (joseph.bylund_at_gmail.com)
Date: Fri Mar 18 2011 - 13:39:37 CDT

How about:
grep -E "^ATOM.{9}CA" myfile.pdb|awk '{print $7","$8}'
you'd have to change the awk indices if it's chain " ".
-Joe

On 03/18/2011 01:58 PM, ban arn wrote:
> Dear VMD users
>
> I would like to know is there any script available in vmd or from
> others sources for projection of c-aplha atom coordinates on xy plane.
>
> Any help is greatly appreciated.
>
> Many Thanks
> Balaji