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Example: Application of a $2\sigma $ Cutoff

The following example sets the $F_{obs}$ to zero for reflections that have $F_{obs}$ values less than $2\sigma $. The FWINdow specification makes sure that all reflections with $F_{obs}=0$ are excluded. 
RESOlution 8. 2.5
FWINdow 0.1 100000.
DO AMPLITUDE (FOBS = FOBS * HEAVY(FOBS-2.0*SIGMA) )

Xplor-NIH 2024-09-13