Hi Smith,

There was an error in script, incidentally, I introduce the error, but now
is fixed. Please download again the centroid.py script.

Cheers,
Osvaldo.

On Fri, Nov 20, 2015 at 3:00 AM, Smith Liu <smith_liu...@163.com> wrote:

> Dear All,
>
> When I run the centroid.py, I have the following error message:
> "NameError: global name 'move' is not defined". My centroid.py script
> downloaded (have I misdone or miseddited something?) is as following. Will
> you please tell me how to solve the error message issue?
>
> Smith
>
>
> ---
> See more here: http://www.pymolwiki.org/index.php/centroid
>
> DESCRIPTION
>          get the centroid (geometric center) of a selection or move
> selection to the origin.
>
> ARGUMENTS
>          selection = string: a valid PyMOL selection {default: all}
>          center = 0 or 1: if center=1 center the selection {default: 0}
>          returns: centroid: [ x, y, z ]
>
>  SEE ALSO
>          get_extent, get_position,
> http://pymolwiki.org/index.php/Center_Of_Mass
>
>  # @AUTHOR: Jason Vertrees
>  # Copyright (c) 2008, Jason Vertrees
>  # All rights reserved.
>  #
>  # Redistribution and use in source and binary forms, with or without
> modification, are permitted provided that the following
>  # conditions are met:
>  #
>  #     * Redistributions of source code must retain the above copyright
> notice, this list of conditions and the following
>  #     * disclaimer.
>  #     * Redistributions in binary form must reproduce the above copyright
> notice, this list of conditions and the following
>  #     * disclaimer in the documentation and/or other materials provided
> with the distribution.
>  #     * Neither the name of the <ORGANIZATION> nor the names of its
> contributors may be used to endorse or promote products derived
>  #     * from this software without specific prior written permission.
>  #
>  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
> IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
>  # NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
> FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
>  # THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
> INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
>  # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
> SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>  # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>  # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
> IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>  #
>  # DATE  : 2008-09-26
>  # REV   : 1
>
> '''
> from pymol import cmd
> from pymol import stored
> from chempy import cpv
>
>
>
>
> def centroid(selection='all', center=0, quiet=1):
>
>
>      model = cmd.get_model(selection)
>      nAtom = len(model.atom)
>
>
>      centroid = cpv.get_null()
>
>
>      for a in model.atom:
>          centroid = cpv.add(centroid, a.coord)
>      centroid = cpv.scale(centroid, 1. / nAtom)
>
>
>      if not int(quiet):
>          print ' centroid: [%8.3f,%8.3f,%8.3f]' % tuple(centroid)
>
>
>      if int(move):
>          cmd.alter_state(1, selection, "(x,y,z)=sub((x,y,z), centroid)",
>                          space={'centroid': centroid, 'sub': cpv.sub})
>
>
>      return centroid
>
>
> cmd.extend("centroid", centroid)
>
>
>
>
>
>
>
>
>
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>
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