[Chimera-users] standalone programs for processing volume data

Elaine Meng meng at cgl.ucsf.edu
Tue Jun 30 09:41:31 PDT 2009

Dear Michele,
You can now subtract maps using the command "vop":

Be aware that this subtraction requires the grids of the two maps to  
be the same (same numbers of points and in the same locations), so you  
might need to use the "vop" resample option first, if that is not  
already true.

I believe the "vop" resampling and subtraction options have been  
available for a while, since version 1.2540 (Jul 2008).

We have been planning to remove the standalone processing programs as  
the same features become available elsewhere in Chimera, and perhaps  
they are currently broken.

I hope this helps,
Elaine C. Meng, Ph.D.
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco

On Jun 30, 2009, at 7:55 AM, Michele Lunelli wrote:

> Dear all,
> I want to use the program combine.py to subtract two delphi  
> potential maps.
> I have the most recent stable version of Chimera installed in /usr/ 
> local/chimera.
> Following the documentation, I set the PYTHONPATH variable with
> setenv PYTHONPATH /usr/local/chimera/share
> then I try to run the program with
> /usr/local/chimera/bin/python2.5 /usr/local/chimera/share/ 
> VolumeProcessing/combine.py
> but the result is always:
> Traceback (most recent call last):
>  File "/usr/local/chimera/share/VolumeProcessing/combine.py", line  
> 12, in <module>
>    from VolumeData import Grid_Data
>  File "/usr/local/chimera/lib/python2.5/site-packages/PIL/ 
> __init__.py", line 10, in <module>
>    #
>  File "CHIMERA/share/VolumeData/opendialog.py", line 70, in <module>
>  File "/usr/local/chimera/lib/python2.5/site-packages/PIL/ 
> __init__.py", line 72, in <module>
>  File "/usr/local/chimera/lib/python2.5/site-packages/PIL/ 
> __init__.py", line 15, in <module>
> ImportError: No module named _chimera
> How can I overcome this problem?
> Thanks in advance,
> Michele
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