[phenixbb] question on f/sigf

Boaz Shaanan bshaanan at exchange.bgu.ac.il
Fri Jul 13 16:36:00 PDT 2012


I think that the math you're looking for is on p. 329 of Rupp's book BMC (eqs. 7-47 - 7-50).



Boaz Shaanan, Ph.D.
Dept. of Life Sciences
Ben-Gurion University of the Negev
Beer-Sheva 84105

E-mail: bshaanan at bgu.ac.il
Phone: 972-8-647-2220  Skype: boaz.shaanan
Fax:   972-8-647-2992 or 972-8-646-1710

From: phenixbb-bounces at phenix-online.org [phenixbb-bounces at phenix-online.org] on behalf of fn1 at rice.edu [fn1 at rice.edu]
Sent: Saturday, July 14, 2012 1:52 AM
To: PHENIX user mailing list
Subject: Re: [phenixbb] question on f/sigf

thank you!

Quoting Nathaniel Echols <nechols at lbl.gov>:

> On Fri, Jul 13, 2012 at 2:25 PM, <fn1 at rice.edu> wrote:
>> I am wondering why f/sigf is always about twice of i/sigi. Is there any
>> mathematics behind this relation? Maybe it is not directly related to
>> phenix, but i sincerely hope someone could help me with it.
> I don't know the logic behind this, but from notes in our code, the default
> implementation appears to be this one:
> http://www.iucr.org/__data/iucr/cif/software/xtal/xtal372htmlman/html/addref-desc.html
> specifically, section
> -Nat

phenixbb mailing list
phenixbb at phenix-online.org

More information about the phenixbb mailing list