[phenixbb] Optimizing the Geometry Weight for a 2.76 A structure

[Edward A. Berry]

Edward A. Berry wrote:
>>
>> sigma(Rfree)/Rfree ~ 1/sqrt(Ntest)
>>
>
> I believe "~" here is read "proportional to", not "approximately".
>
No, seems it should be "approximately":
"Interestingly, the standard deviation of the free R value is approximately
given by Rfree/(n)^1/2, where n is the number of reflections in the test set."
Free R Value: Cross-Validation in Crystallography - AXEL T. BRUNGER METHODS IN ENZYMOLOGY, 
VOL. 277