Re: [ccp4bb] Program to fill unitcell randomly

2008-12-01 Thread Daniel Anderson
(I don't remember the motivation for the original question.) Shake-and-Bake used to generate random atoms in an asymmetric unit, and the program kept the atoms spaced by at least a bond length. Since PDB entry 2erl, I am not up to date on Shake-and-Bake's current set of tricks. The crystal fo

Re: [ccp4bb] Program to fill unitcell randomly

2008-12-01 Thread Ethan Merritt
On Monday 01 December 2008 15:07:56 Edward A. Berry wrote: > Thanks, Ethan, > For your third point- I realized (after sending) that the distribution > would be stretched along the long axis- but actually I'm having > a hard time coming to grips with that conceptually- if there > are n atoms in the

Re: [ccp4bb] Program to fill unitcell randomly

2008-12-01 Thread Edward A. Berry
Thanks, Ethan, For your third point- I realized (after sending) that the distribution would be stretched along the long axis- but actually I'm having a hard time coming to grips with that conceptually- if there are n atoms in the cell, they will necessarily be distributed more sparsely in projecti

Re: [ccp4bb] Program to fill unitcell randomly

2008-12-01 Thread Ethan Merritt
On Monday 01 December 2008 10:28:34 Edward A. Berry wrote: > Ethan A Merritt wrote: > > On Friday 28 November 2008, Mueller, Juergen-Joachim wrote: > >> Dear all, > >> does anybody know a program to > >> fill an unit cell a,b,c randomly by an arbitrary number > >> of spheres (atoms)? > > > > First

Re: [ccp4bb] Program to fill unitcell randomly

2008-12-01 Thread Edward A. Berry
Ethan A Merritt wrote: On Friday 28 November 2008, Mueller, Juergen-Joachim wrote: Dear all, does anybody know a program to fill an unit cell a,b,c randomly by an arbitrary number of spheres (atoms)? First you would need to define "random". Uniform density throughout the lattice? Uniform dis

Re: [ccp4bb] Program to fill unitcell randomly

2008-11-29 Thread Ralf W. Grosse-Kunstleve
i.lbl.gov/cctbx_sources/cctbx/development/random_structure.py Around the middle of the file, "class xray_structure" From: "Mueller, Juergen-Joachim" <[EMAIL PROTECTED]> To: CCP4BB@JISCMAIL.AC.UK Sent: Friday, November 28, 2008 1:59:32 AM Su

Re: [ccp4bb] Program to fill unitcell randomly

2008-11-28 Thread Ethan A Merritt
On Friday 28 November 2008, Mueller, Juergen-Joachim wrote: > > Dear all, > does anybody know a program to > fill an unit cell a,b,c randomly by an arbitrary number > of spheres (atoms)? First you would need to define "random". Uniform density throughout the lattice? Uniform distribution of nei

[ccp4bb] Program to fill unitcell randomly

2008-11-28 Thread Mueller, Juergen-Joachim
Dear all, does anybody know a program to fill an unit cell a,b,c randomly by an arbitrary number of spheres (atoms)? Thank you for help, Juergen