[phenixbb] question on f/sigf

[fn1 at rice.edu]

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 4.5.2.4.
>
> -Nat
>