[phenixbb] Maximum-likelihood score calculation
Pavel Afonine
pafonine at lbl.gov
Fri Jul 11 17:54:47 PDT 2014
ML used in phenix.refine does not contain a constant term (to save
computation time; perhaps there is no huge gain!) and is normalized by
the number of reflections so the value is between 0 and ~10 most of the
time (that makes it predictable and so it can be calibrated to use for
various purposes).
Pavel
On 7/11/14, 5:07 PM, Nathaniel Echols wrote:
> On Fri, Jul 11, 2014 at 4:57 PM, Pavel Afonine <pafonine at lbl.gov
> <mailto:pafonine at lbl.gov>> wrote:
>
> 1) ML targets used in phenix.refine and Phaser are essentially the
> same but parametrized differently (alpha/beta vs sigmaA).
>
>
> ... but they are not reported the same way - phenix.refine shows a raw
> target value (normalized?), while Phaser outputs TFZ and LLG.
> Presumably these are related somehow but it is not obvious to me.
>
> -Nat
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