[phenixbb] making course maps

Pavel Afonine pafonine at lbl.gov
Fri Jan 30 08:27:51 PST 2015

Hi Scott,

resolution and map gridding are related. Max resolution (amount of 
reflections) you can get from map sampled on (N1,N2,N3) grid is 
|h|<N1/2, |k|<N2/2, |l|<N3/2, where (N1,N2,N3) are grid dimensions for 
sampling density for FFT. Note, what you typically get is a sphere 
carved out of that box.


On 1/30/15 5:09 AM, Scott Horowitz wrote:
> Hi all,
> Although I realize this sounds counterproductive, I'd really like to 
> be able to make a map with grid spacing that is around 3 A, even 
> though I have a ~2 A structure, and I don't want to have to cut data 
> before refinement. However, it seems like the max number I can give to 
> the grid resolution factor is 0.5. Is there a way to break this limit 
> without it crashing?
> Thanks,
> Scott
> -- 
> Scott Horowitz, Ph.D.
> Research Associate
> Howard Hughes Medical Institute
> University of Michigan
> Department of Molecular, Cellular, and Developmental Biology
> Bardwell lab
> 830 N. University Ave, Room 4007
> Ann Arbor, MI 48109
> phone: 734-647-6683
> fax: 734-615-4226
> _______________________________________________
> phenixbb mailing list
> phenixbb at phenix-online.org
> http://phenix-online.org/mailman/listinfo/phenixbb

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