got it! thanks.

Xavier Prat-Resina wrote:

> Bob,
>
> the fix solved most of the problems, but it still doesn't find the plane
> when all the atoms are contained in it
>
> Hypochlorous Acid : C<sub>S</sub> : C1  
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=34
> Hyponitrous Acid : C<sub>S</sub> : C1  
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=98
>
> I have a question/request. When the algorithm looks for symmetry elements,
> would it be useful to introduce a keyword to control the tolerance for 
> distance/angles
> comparisons?

OK, that's in for 11.6.RC2

set pointGroupDistanceTolerance (default 0.2 angstroms)
set pointGroupLinearTolerance (default 8 degrees)

> I can imagine that for experimental structures the tolerance should be 
> higher,
> and the user might need to tune that.
> Just a thought.
>
> Xavier
>
> On Wed, Aug 6, 2008 at 5:23 PM, Bob Hanson <[EMAIL PROTECTED] 
> <mailto:[EMAIL PROTECTED]>> wrote:
>
>     I just uploaded a fix -- should be good as SourceForge. And Nico just
>     released a version, so please check that.
>
>     Xavier Prat-Resina wrote:
>
>     > Bob,
>     >
>     > this is a very nice tool!
>     > I still don't see the solution to the problem that Jonathan
>     pointed out,
>     > I still get D3d for his BF3.PDB with version 11.6.RC1, is there any
>     > other version?
>     > I know you are still debugging, so I thought it might be useful
>     to report
>     > what seems to me some discrepancies between the symmetry
>     computed by jmol
>     > and the one computed by Patchovskii's code. In some cases jmol
>     is better!
>     > Here's a list of the molecules in which jmol failed to identify the
>     > symmetry point group.
>     > It seems that it doesn't find some planes.
>     >
>     > Name : patchovskii : jmol : link
>     >
>     > Chlorine Dioxide : C<sub>2V</sub> : C2h
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=13
>     > Hypochlorous Acid : C<sub>S</sub> : C1
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=34
>     > Nitrite Ion : C<sub>2V</sub> : C2h
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=41
>     > Nitrogen Dioxide : C<sub>2V</sub> : C2h
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=43
>     > Nitrous Acid : C<sub>S</sub> : C1
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=46
>     > Oxygen Difluoride : C<sub>2V</sub> : C2h
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=49
>     > Sulfur Dioxide : C<sub>2V</sub> : C2h
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=57
>     > Sulfur Trioxide : D<sub>3H</sub> : D3d
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=60
>     > Aluminum Chloride : D<sub>3H</sub> : D3d
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=79
>     > Aluminum Fluoride : D<sub>3H</sub> : D3d
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=80
>     > Chlorine Oxide : C<sub>2V</sub> : C2h
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=92
>     > Hyponitrous Acid : C<sub>S</sub> : C1
>     >
>     
> http://www.chemeddl.org/collections/labs/avisualdatabase/index.php?molecule=98
>     >
>     > Xavier
>     >
>     >
>     > On Wed, Aug 6, 2008 at 2:28 PM, Jonathan Gutow <[EMAIL PROTECTED]
>     <mailto:[EMAIL PROTECTED]>
>     > <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>> wrote:
>     >
>     >     That seems to have fixed the problem.  This is quite cool!
>     >     Jonathan
>     >     On Aug 6, 2008, at 1:06 PM, Bob Hanson wrote:
>     >
>     >     > There we go.... I was checking only for planes
>     perpendicular only
>     >     > to C2
>     >     > axes, not C3. Better?
>     >     >
>     >
>     >                              Dr. Jonathan H. Gutow
>     >     Chemistry Department
>     >     [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
>     <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
>     >     UW-Oshkosh
>     >     Office:920-424-1326
>     >     800 Algoma Boulevard                                
>     FAX:920-424-2042
>     >     Oshkosh, WI 54901
>     >                      http://www.uwosh.edu/faculty_staff/gutow/
>     >
>     >
>     >
>     >
>     >
>     >    
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>     > --
>     > Xavier Prat-Resina
>     > Research Associate
>     > Journal of Chemical Education and University of Wisconsin
>     > 209 N. Brooks St. Madison, WI 53715-1116
>     >
>     > Tel: 608 8901702 // Fax: 608 2627145
>     > e-mail: xavier ( ) chem.wisc.edu <http://chem.wisc.edu>
>     <http://chem.wisc.edu> ; skype:
>     > xavierprat
>     > http://x.prat.resina.googlepages.com
>     >
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>     --
>     Robert M. Hanson
>     Professor of Chemistry
>     St. Olaf College
>     Northfield, MN
>     http://www.stolaf.edu/people/hansonr
>
>
>     If nature does not answer first what we want,
>     it is better to take what answer we get.
>
>     -- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
>
>
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>
> -- 
> Xavier Prat-Resina
> Research Associate
> Journal of Chemical Education and University of Wisconsin
> 209 N. Brooks St. Madison, WI 53715-1116
>
> Tel: 608 8901702 // Fax: 608 2627145
> e-mail: xavier ( ) chem.wisc.edu <http://chem.wisc.edu> ; skype: 
> xavierprat
> http://x.prat.resina.googlepages.com
>
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>


-- 
Robert M. Hanson
Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr


If nature does not answer first what we want,
it is better to take what answer we get. 

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900



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