Truncate doesn't alter the intensities, except by an arbitrary scale
factor. What it does is estimate |F|
But it does produce some useful statistics
Phil
On 10 Nov 2008, at 13:09, James Whittle wrote:
Dear ccp4ers,
I hope you won't mind revisiting more twinning questions, but this
thread has me considering whether I have treated some recently
collected, most likely twinned, data in the best way.
Last week I was told that I ought to let phenix.refine choose freeR
flags for twinned data, as that program takes into account twinning
in choosing the set. Is it then better to provide the intensities
(as a scalepack file) directly to phenix.refine, or is scaling them
with TRUNCATE still good practice?
My initial thought was that the difference between using TRUNCATE or
not would be marginal, but perhaps in the case of twinned data it is
better to skip that step?
Please excuse me for bringing up twinning again, as there seems
already to be disproportionate coverage of it on the bulletin board...
--James
on the experimental sigma(I). This enables all the data to be
used and facilitates the refinement of twinned structures.
