I have used phenix.xtriage. It finds three twin laws with alpha ~0.48 for all of them and the results of the perfect twin test are well over 2.
Ben
On 9/22/09 1:50 PM, Tanner, John J. wrote:
> I suggest you analyze your data with phenix.xtriage. It does several tests and gives descriptive output.
>
>
> ________________________________
> From: Ben Flath <[log in to unmask]>
> Reply-To: Ben Flath <[log in to unmask]>
> Date: Tue, 22 Sep 2009 14:31:26 -0500
> To: <[log in to unmask]>
> Conversation: [ccp4bb] perfect twin test
> Subject: [ccp4bb] perfect twin test
>
> Hi all
>
> when subjecting my data to the perfect twin test <I*2>/<I>*2 I get values very close to 3 which is far off the theoretical values of 1.5 and 2 for twinned and untwinned data.
>
> can anyone shed some light on what might be going on with my data. Could tetartohedral twinning have anything to do with it?
>
> Thanks
>
>
> ---------------------------------
>
> Benjamin Flath
> College of Pharmacy and Nutrition
> University of Saskatchewan
> 320 Thorvaldson Building
> 110 Science Place
> Saskatoon, SK
> S7N 5C9
|