Re: [PyMOL] RMSD between two structures

2011-11-30 Thread Thomas Holder
One should emphasize that this alignment is a *sequence* alignment in case of the "align" command. Cheers, Thomas On 11/30/2011 11:19 AM, Tsjerk Wassenaar wrote: > Hi Martin, > > It does an alignment, finding matching pairs of atoms, removing > outliers and calculating the RMSD over the remai

Re: [PyMOL] RMSD between two structures

2011-11-30 Thread Tsjerk Wassenaar
Hi Martin, It does an alignment, finding matching pairs of atoms, removing outliers and calculating the RMSD over the remaining matches. Cheers, Tsjerk On Wed, Nov 30, 2011 at 11:05 AM, Martin Hediger wrote: > How does PyMOL calculate the RMSD between two structures where the > number of atoms

Re: [PyMOL] RMSD between two structures

2011-11-30 Thread Martin Hediger
How does PyMOL calculate the RMSD between two structures where the number of atoms is different? Martin Am 11.11.11 14:59, schrieb Thomas Holder: > Hi Martin, > > is it the transform=0 argument what you are looking for? > > http://pymolwiki.org/index.php/Align#PYMOL_API > > x = cmd.align('fo

Re: [PyMOL] RMSD between two structures

2011-11-29 Thread Tsjerk Wassenaar
Hi Martin, It should be RMSD indeed. Mind that the final RMSD from align is obtained after optimizing the fit by leaving out outliers. Cheers, Tsjerk On Nov 29, 2011 10:07 AM, "Martin Hediger" wrote: Is the RMS the same as RMSD? PyMOL writes "RMS" when using align. Martin Am 11.11.11 14:

Re: [PyMOL] RMSD between two structures

2011-11-29 Thread Martin Hediger
Is the RMS the same as RMSD? PyMOL writes "RMS" when using align. Martin Am 11.11.11 14:59, schrieb Thomas Holder: > Hi Martin, > > is it the transform=0 argument what you are looking for? > > http://pymolwiki.org/index.php/Align#PYMOL_API > > x = cmd.align('foo', 'bar', transform=0) > print '

Re: [PyMOL] RMSD between two structures

2011-11-11 Thread Thomas Holder
Hi Martin, is it the transform=0 argument what you are looking for? http://pymolwiki.org/index.php/Align#PYMOL_API x = cmd.align('foo', 'bar', transform=0) print 'RMSD:', x[0] About the "some kind of refinement": There are arguments "cutoff" and "cycles" that control this behaviour. Cheers,

[PyMOL] RMSD between two structures

2011-11-11 Thread Martin Hediger
Dear List. When aligning two structures using the PyMOL align command, one gets a final RMS value indicating some kind of "convergence" i would say. Can I somehow access the function for calculating this value directly from the pymol prompt without aligning? Thanks for hints Martin ---